CWE-770
AllowedAllocation of Resources Without Limits or Throttling
Abstraction: Base · Status: Incomplete
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
3119 vulnerabilities reference this CWE, most recent first.
GHSA-4GM9-C9JQ-G523
Vulnerability from github – Published: 2023-05-19 18:30 – Updated: 2023-05-19 23:46Froxlor prior to 2.0.16 has a password reset page with no rate limit.
{
"affected": [
{
"package": {
"ecosystem": "Packagist",
"name": "froxlor/froxlor"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.16"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-2666"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2023-05-19T23:46:03Z",
"nvd_published_at": "2023-05-12T01:15:09Z",
"severity": "MODERATE"
},
"details": "Froxlor prior to 2.0.16 has a password reset page with no rate limit.",
"id": "GHSA-4gm9-c9jq-g523",
"modified": "2023-05-19T23:46:03Z",
"published": "2023-05-19T18:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2666"
},
{
"type": "WEB",
"url": "https://github.com/froxlor/froxlor/commit/1679675aa1c29d24344dd2e091ff252accb111d6"
},
{
"type": "PACKAGE",
"url": "https://github.com/froxlor/froxlor"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/0bbdc9d4-d9dc-4490-93ef-0a83b451a20f"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Froxlor vulnerable to Allocation of Resources Without Limits or Throttling"
}
GHSA-4GQJ-V3RW-HWJG
Vulnerability from github – Published: 2026-01-16 00:30 – Updated: 2026-01-16 00:30Telegram Desktop 2.9.2 contains a denial of service vulnerability that allows attackers to crash the application by sending an oversized message payload. Attackers can generate a 9 million byte buffer and paste it into the messaging interface to trigger an application crash.
{
"affected": [],
"aliases": [
"CVE-2021-47793"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-16T00:16:23Z",
"severity": "MODERATE"
},
"details": "Telegram Desktop 2.9.2 contains a denial of service vulnerability that allows attackers to crash the application by sending an oversized message payload. Attackers can generate a 9 million byte buffer and paste it into the messaging interface to trigger an application crash.",
"id": "GHSA-4gqj-v3rw-hwjg",
"modified": "2026-01-16T00:30:55Z",
"published": "2026-01-16T00:30:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47793"
},
{
"type": "WEB",
"url": "https://telegram.org"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/50247"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/telegram-desktop-denial-of-service-poc"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-4GRH-X943-5H7Q
Vulnerability from github – Published: 2025-01-28 00:32 – Updated: 2025-11-03 21:32The issue was addressed with improved checks. This issue is fixed in iPadOS 17.7.4, macOS Ventura 13.7.3, macOS Sonoma 14.7.3, visionOS 2.3, iOS 18.3 and iPadOS 18.3, macOS Sequoia 15.3, watchOS 11.3, tvOS 18.3. Parsing a file may lead to an unexpected app termination.
{
"affected": [],
"aliases": [
"CVE-2025-24123"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-27T22:15:17Z",
"severity": "CRITICAL"
},
"details": "The issue was addressed with improved checks. This issue is fixed in iPadOS 17.7.4, macOS Ventura 13.7.3, macOS Sonoma 14.7.3, visionOS 2.3, iOS 18.3 and iPadOS 18.3, macOS Sequoia 15.3, watchOS 11.3, tvOS 18.3. Parsing a file may lead to an unexpected app termination.",
"id": "GHSA-4grh-x943-5h7q",
"modified": "2025-11-03T21:32:25Z",
"published": "2025-01-28T00:32:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-24123"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122066"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122067"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122068"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122069"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122070"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122071"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122072"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122073"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Jan/12"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Jan/14"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Jan/15"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Jan/16"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Jan/17"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Jan/19"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GRM-H2QV-H6W6
Vulnerability from github – Published: 2026-06-15 20:43 – Updated: 2026-06-15 20:43Summary
A memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error.
Details
The vulnerability exists in io.netty.handler.codec.http3.QpackDecoder#shouldWaitForDynamicTableUpdates:
If a client sends a header referencing a table entry that the server hasn't received yet, the server must pause that stream and wait for the missing entry to arrive. To prevent attackers from exhausting resources by intentionally sending missing references, Netty limits the number of streams that can be blocked at the same time.
However, the check is implemented as:
if (blockedStreamsCount == maxBlockedStreams - 1) {
If the server enables QPACK dynamic tables (by setting HTTP3_SETTINGS_QPACK_MAX_TABLE_CAPACITY > 0) but does not explicitly configure HTTP3_SETTINGS_QPACK_BLOCKED_STREAMS, it defaults to 0.
When maxBlockedStreams is 0, the condition evaluates to blockedStreamsCount == -1. Since blockedStreamsCount starts at 0 and only increments, it never equals -1. This bypasses the limit, allowing an attacker to open an infinite number of streams that block indefinitely. Additionally, the QpackDecoder never removes unblocked streams from the blockedStreams map or decrements the counter, meaning the ReadResumptionListener for each blocked stream is kept in memory for the entire lifetime of the connection. This exhausts server memory and crashes the JVM.
Impact
Denial of Service. Any server using netty-codec-http3 with QPACK dynamic tables enabled and maxBlockedStreams defaulting to 0 is impacted.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.2.13.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-http3"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Final"
},
{
"fixed": "4.2.15.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-48748"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-15T20:43:13Z",
"nvd_published_at": "2026-06-12T16:16:30Z",
"severity": "HIGH"
},
"details": "### Summary\nA memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error.\n\n### Details\nThe vulnerability exists in `io.netty.handler.codec.http3.QpackDecoder#shouldWaitForDynamicTableUpdates`:\n\nIf a client sends a header referencing a table entry that the server hasn\u0027t received yet, the server must pause that stream and wait for the missing entry to arrive. To prevent attackers from exhausting resources by intentionally sending missing references, Netty limits the number of streams that can be blocked at the same time.\n\nHowever, the check is implemented as:\n\n```java\nif (blockedStreamsCount == maxBlockedStreams - 1) {\n```\n\nIf the server enables QPACK dynamic tables (by setting `HTTP3_SETTINGS_QPACK_MAX_TABLE_CAPACITY` \u003e 0) but does not explicitly configure `HTTP3_SETTINGS_QPACK_BLOCKED_STREAMS`, it defaults to 0.\n\nWhen `maxBlockedStreams` is 0, the condition evaluates to `blockedStreamsCount == -1`. Since `blockedStreamsCount` starts at `0` and only increments, it never equals `-1`. This bypasses the limit, allowing an attacker to open an infinite number of streams that block indefinitely. Additionally, the `QpackDecoder` never removes unblocked streams from the `blockedStreams` map or decrements the counter, meaning the `ReadResumptionListener` for each blocked stream is kept in memory for the entire lifetime of the connection. This exhausts server memory and crashes the JVM.\n\n### Impact\nDenial of Service. Any server using `netty-codec-http3` with QPACK dynamic tables enabled and maxBlockedStreams defaulting to 0 is impacted.",
"id": "GHSA-4grm-h2qv-h6w6",
"modified": "2026-06-15T20:43:13Z",
"published": "2026-06-15T20:43:13Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48748"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion"
}
GHSA-4GRW-M28R-Q285
Vulnerability from github – Published: 2024-12-05 17:31 – Updated: 2024-12-05 19:05During a security audit, Radically Open Security discovered two vulnerabilities which allow attackers to trigger resource exhaustion vulnerabilities in rpgp by providing crafted messages. This affects general message parsing and decryption with symmetric keys.
Impact
Affected rpgp versions do not correctly set upper limits on the total reserved amount of memory when parsing long sequences of partial OpenPGP packets, which can grow to to several GiB in size. Additionally, up to 4GiB of memory is reserved for OpenPGP packets of fixed size with large length fields, even if less data is received.
Depending on existing message size restrictions and available system resources, this can cause out-of-memory conditions and crash the rpgp process or cause other system instability through memory resource exhaustion when parsing crafted messages.
Affected rpgp versions are susceptible to excessive memory allocation with values of up to 2TiB or long processing times for some decryption operations which involve the Argon2 function. An attacker can provide a valid Symmetric Key Encrypted Session Key packet (SKESK) which uses Argon2 for String-to-Key hashing with parameters that are excessive, but within specification limits of the RFC9580 OpenPGP standard. Since rpgp did not further restrict the Argon2 parameters, this can cause out-of-memory conditions and crash the rpgp process. Under some conditions, the memory resource exhaustion may trigger other system instability. Alternatively, this can make the program unresponsive via long computations. The attacker needs to trick a victim into attempting decryption, but does not require knowledge of the symmetric secret used by the victim.
There is no impact to confidentiality or integrity security properties.
Versions and Patches
The impact details on the message parsing component varies with different versions. We've confirmed some of the problematic behavior on older versions such as v0.10.0 and see all recent versions as affected in some form.
The affected Argon2 functionality was introduced with v0.12.0-alpha.1, earlier versions are not vulnerable.
The vulnerabilities have been fixed with version 0.14.2. We recommend all users to upgrade to this version.
References
The security audit was made possible by the NLnet Foundation NGI Zero Core grant program for rpgp.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "pgp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.14.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-53857"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2024-12-05T17:31:35Z",
"nvd_published_at": "2024-12-05T16:15:26Z",
"severity": "HIGH"
},
"details": "During a security audit, [Radically Open Security](https://www.radicallyopensecurity.com/) discovered two vulnerabilities which allow attackers to trigger resource exhaustion vulnerabilities in `rpgp` by providing crafted messages. This affects general message parsing and decryption with symmetric keys.\n\n### Impact\nAffected `rpgp` versions do not correctly set upper limits on the total reserved amount of memory when parsing long sequences of partial OpenPGP packets, which can grow to to several GiB in size. Additionally, up to 4GiB of memory is reserved for OpenPGP packets of fixed size with large length fields, even if less data is received. \nDepending on existing message size restrictions and available system resources, this can cause out-of-memory conditions and crash the `rpgp` process or cause other system instability through memory resource exhaustion when parsing crafted messages.\n\nAffected `rpgp` versions are susceptible to excessive memory allocation with values of up to 2TiB or long processing times for some decryption operations which involve the [Argon2 function](https://datatracker.ietf.org/doc/html/rfc9580.html#name-argon2). An attacker can provide a valid `Symmetric Key Encrypted Session Key` packet (SKESK) which uses `Argon2` for String-to-Key hashing with parameters that are excessive, but within specification limits of the RFC9580 OpenPGP standard. Since `rpgp` did not further restrict the Argon2 parameters, this can cause out-of-memory conditions and crash the `rpgp` process. Under some conditions, the memory resource exhaustion may trigger other system instability. Alternatively, this can make the program unresponsive via long computations. The attacker needs to trick a victim into attempting decryption, but does not require knowledge of the symmetric secret used by the victim.\n\nThere is no impact to confidentiality or integrity security properties.\n\n### Versions and Patches\n\nThe impact details on the message parsing component varies with different versions. We\u0027ve confirmed some of the problematic behavior on older versions such as `v0.10.0` and see all recent versions as affected in some form. \n\nThe affected `Argon2` functionality was introduced with `v0.12.0-alpha.1`, earlier versions are not vulnerable.\n\nThe vulnerabilities have been fixed with version `0.14.2`. We recommend all users to upgrade to this version.\n\n### References\n\n\nThe security audit was made possible by the [NLnet Foundation NGI Zero Core](https://nlnet.nl/core/) grant program [for rpgp](https://nlnet.nl/project/rPGP-cryptorefresh/).",
"id": "GHSA-4grw-m28r-q285",
"modified": "2024-12-05T19:05:49Z",
"published": "2024-12-05T17:31:35Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/rpgp/rpgp/security/advisories/GHSA-4grw-m28r-q285"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53857"
},
{
"type": "PACKAGE",
"url": "https://github.com/rpgp/rpgp"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "rPGP Potential Resource Exhaustion when handling Untrusted Messages"
}
GHSA-4GX8-M984-9P5Q
Vulnerability from github – Published: 2023-01-26 21:30 – Updated: 2023-02-01 15:30In AutomaticZenRule of AutomaticZenRule.java, there is a possible failure to persist permissions settings due to resource exhaustion. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-12L Android-13Android ID: A-242703780
{
"affected": [],
"aliases": [
"CVE-2022-20456"
],
"database_specific": {
"cwe_ids": [
"CWE-276",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-01-26T21:15:00Z",
"severity": "HIGH"
},
"details": "In AutomaticZenRule of AutomaticZenRule.java, there is a possible failure to persist permissions settings due to resource exhaustion. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-12L Android-13Android ID: A-242703780",
"id": "GHSA-4gx8-m984-9p5q",
"modified": "2023-02-01T15:30:19Z",
"published": "2023-01-26T21:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-20456"
},
{
"type": "WEB",
"url": "https://source.android.com/security/bulletin/2023-01-01"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4H2P-HMWX-G38G
Vulnerability from github – Published: 2025-05-29 21:31 – Updated: 2025-05-29 21:31IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 through 11.5.9 and 12.1.0 through 12.1.1 could allow an authenticated user to cause a denial of service when using Q replication due to the improper allocation of CPU resources.
{
"affected": [],
"aliases": [
"CVE-2025-3050"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-29T20:15:26Z",
"severity": "MODERATE"
},
"details": "IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 through 11.5.9 and 12.1.0 through 12.1.1 could allow an authenticated user to cause a denial of service when using Q replication due to the improper allocation of CPU resources.",
"id": "GHSA-4h2p-hmwx-g38g",
"modified": "2025-05-29T21:31:37Z",
"published": "2025-05-29T21:31:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-3050"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7235073"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4H45-JPVH-6P5J
Vulnerability from github – Published: 2025-08-29 15:38 – Updated: 2025-08-29 15:38Impact
A vulnerability has been identified within Rancher Manager in which it did not enforce request body size limits on certain public (unauthenticated) and authenticated API endpoints. This allows a malicious user to exploit this by sending excessively large payloads, which are fully loaded into memory during processing. This could result in:
- Denial of Service (DoS): The server process may crash or become unresponsive when memory consumption exceeds available resources.
- Unauthenticated and authenticated exploitation: While the issue was initially observed in unauthenticated /v3-public/* endpoints, the absence of request body size limits also affected several authenticated APIs, broadening the potential attack surface. It's worth noting that other areas in Rancher do implement safeguards: requests proxied to Kubernetes APIs are subject to built-in size limits enforced by the Kubernetes API server itself, and Norman-based endpoints parse input with predefined size caps. However, the absence of similar protections in other Rancher APIs increased the risk of denial-of-service (DoS) scenarios in certain contexts.
By sending large binary or text payloads to vulnerable endpoints, a malicious actor could disrupt Rancher’s availability, impacting both administrative and user operations across managed clusters.
Please consult the associated MITRE ATT&CK - Technique - Network Denial of Service for further information about this category of attack.
Patches
This vulnerability is addressed by adding a default limit of 1MiB and a setting in case this value needs to be increased.
Patched versions of Rancher include releases v2.12.1, v2.11.5, v2.10.9 and v2.9.12.
Workarounds
If you can't upgrade to a fixed version, please make sure that you are manually setting the request body size limits. For example, using nginx-ingress controller and only allowing requests via the ingress. For reference on how to configure the limit manually, please consult the Knowledge Base.
References
If you have any questions or comments about this advisory: - Reach out to the SUSE Rancher Security team for security related inquiries. - Open an issue in the Rancher repository. - Verify with our support matrix and product support lifecycle.
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/rancher/rancher"
},
"ranges": [
{
"events": [
{
"introduced": "2.12.0"
},
{
"fixed": "2.12.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/rancher/rancher"
},
"ranges": [
{
"events": [
{
"introduced": "2.11.0"
},
{
"fixed": "2.11.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/rancher/rancher"
},
"ranges": [
{
"events": [
{
"introduced": "2.10.0"
},
{
"fixed": "2.10.9"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/rancher/rancher"
},
"ranges": [
{
"events": [
{
"introduced": "2.9.0"
},
{
"fixed": "2.9.11"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/rancher/rancher"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.0.0-20250813072957-aee95d4e2a41"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-58259"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2025-08-29T15:38:23Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "### Impact\nA vulnerability has been identified within Rancher Manager in which it did not enforce request body size limits on certain public (unauthenticated) and authenticated API endpoints. This allows a malicious user to exploit this by sending excessively large payloads, which are fully loaded into memory during processing. This could result in:\n- Denial of Service (DoS): The server process may crash or become unresponsive when memory consumption exceeds available resources.\n- Unauthenticated and authenticated exploitation: While the issue was initially observed in unauthenticated `/v3-public/*` endpoints, the absence of request body size limits also affected several authenticated APIs, broadening the potential attack surface. It\u0027s worth noting that other areas in Rancher do implement safeguards: requests proxied to Kubernetes APIs are subject to built-in size limits enforced by the [Kubernetes API server itself](https://github.com/kubernetes/kubernetes/blob/v1.33.4/staging/src/k8s.io/apiserver/pkg/server/config.go#L465), and Norman-based endpoints parse input with [predefined size caps](https://github.com/rancher/norman/blob/41dfae2f1a640c5ac9304e8b51e45a0f52cbdbb9/parse/read_input.go#L20-L31). However, the absence of similar protections in other Rancher APIs increased the risk of denial-of-service (DoS) scenarios in certain contexts.\n\nBy sending large binary or text payloads to vulnerable endpoints, a malicious actor could disrupt Rancher\u2019s availability, impacting both administrative and user operations across managed clusters.\n \nPlease consult the associated [MITRE ATT\u0026CK - Technique - Network Denial of Service](https://attack.mitre.org/techniques/T1498/) for further information about this category of attack.\n\n### Patches\nThis vulnerability is addressed by adding a default limit of `1MiB` and a setting in case this value needs to be increased.\n\nPatched versions of Rancher include releases `v2.12.1`, `v2.11.5`, `v2.10.9` and `v2.9.12`.\n\n### Workarounds\nIf you can\u0027t upgrade to a fixed version, please make sure that you are manually setting the request body size limits. For example, using nginx-ingress controller and only allowing requests via the ingress. For reference on how to configure the limit manually, please consult the [Knowledge Base](https://www.suse.com/support/kb/doc/?id=000021309).\n\n### References\nIf you have any questions or comments about this advisory:\n- Reach out to the [SUSE Rancher Security team](https://github.com/rancher/rancher/security/policy) for security related inquiries.\n- Open an issue in the [Rancher](https://github.com/rancher/rancher/issues/new/choose) repository.\n- Verify with our [support matrix](https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/) and [product support lifecycle](https://www.suse.com/lifecycle/).",
"id": "GHSA-4h45-jpvh-6p5j",
"modified": "2025-08-29T15:38:23Z",
"published": "2025-08-29T15:38:23Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/rancher/rancher/security/advisories/GHSA-4h45-jpvh-6p5j"
},
{
"type": "WEB",
"url": "https://github.com/rancher/rancher/commit/aee95d4e2a41ba2df6f88c9634d4fe1f42dee4d9"
},
{
"type": "PACKAGE",
"url": "https://github.com/rancher/rancher"
},
{
"type": "WEB",
"url": "https://github.com/rancher/rancher/releases/tag/v2.10.9"
},
{
"type": "WEB",
"url": "https://github.com/rancher/rancher/releases/tag/v2.11.5"
},
{
"type": "WEB",
"url": "https://github.com/rancher/rancher/releases/tag/v2.12.1"
},
{
"type": "WEB",
"url": "https://github.com/rancher/rancher/releases/tag/v2.9.11"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
}
],
"summary": "Rancher affected by unauthenticated Denial of Service"
}
GHSA-4H4R-Q9XG-GFMM
Vulnerability from github – Published: 2026-07-21 15:30 – Updated: 2026-07-22 21:31A flaw was found in libssh. A malicious SFTP server can send responses for unknown request IDs that libssh clients keep queued indefinitely, causing unbounded memory growth and client-side denial of service.
{
"affected": [],
"aliases": [
"CVE-2026-59848"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-21T14:16:34Z",
"severity": "MODERATE"
},
"details": "A flaw was found in libssh. A malicious SFTP server can send responses for unknown request IDs that libssh clients keep queued indefinitely, causing unbounded memory growth and client-side denial of service.",
"id": "GHSA-4h4r-q9xg-gfmm",
"modified": "2026-07-22T21:31:54Z",
"published": "2026-07-21T15:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59848"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:42922"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-59848"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2498181"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-4H6R-MCCQ-VG7C
Vulnerability from github – Published: 2026-05-12 21:31 – Updated: 2026-05-12 21:31A vulnerability in a network management service of AOS-8 Operating System could allow an unauthenticated remote attacker to exploit this vulnerability by sending specially crafted network packets to the affected device, potentially resulting in a denial-of-service condition. Successful exploitation could cause the affected service process to terminate unexpectedly, disrupting normal device operations.
{
"affected": [],
"aliases": [
"CVE-2026-23826"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-12T20:16:31Z",
"severity": "HIGH"
},
"details": "A vulnerability in a network management service of AOS-8 Operating System could allow an unauthenticated remote attacker to exploit this vulnerability by sending specially crafted network packets to the affected device, potentially resulting in a denial-of-service condition. Successful exploitation could cause the affected service process to terminate unexpectedly, disrupting normal device operations.",
"id": "GHSA-4h6r-mccq-vg7c",
"modified": "2026-05-12T21:31:33Z",
"published": "2026-05-12T21:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23826"
},
{
"type": "WEB",
"url": "https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05048en_us\u0026docLocale=en_US"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
Clearly specify the minimum and maximum expectations for capabilities, and dictate which behaviors are acceptable when resource allocation reaches limits.
Mitigation
Limit the amount of resources that are accessible to unprivileged users. Set per-user limits for resources. Allow the system administrator to define these limits. Be careful to avoid CWE-410.
Mitigation
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place, and it will help the administrator to identify who is committing the abuse. The login application should be protected against DoS attacks as much as possible. Limiting the database access, perhaps by caching result sets, can help minimize the resources expended. To further limit the potential for a DoS attack, consider tracking the rate of requests received from users and blocking requests that exceed a defined rate threshold.
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation MIT-15
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation
- Mitigation of resource exhaustion attacks requires that the target system either:
- The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
- The second solution can be difficult to effectively institute -- and even when properly done, it does not provide a full solution. It simply requires more resources on the part of the attacker.
- recognizes the attack and denies that user further access for a given amount of time, typically by using increasing time delays
- uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Mitigation
Ensure that protocols have specific limits of scale placed on them.
Mitigation MIT-38.1
- If the program must fail, ensure that it fails gracefully (fails closed). There may be a temptation to simply let the program fail poorly in cases such as low memory conditions, but an attacker may be able to assert control before the software has fully exited. Alternately, an uncontrolled failure could cause cascading problems with other downstream components; for example, the program could send a signal to a downstream process so the process immediately knows that a problem has occurred and has a better chance of recovery.
- Ensure that all failures in resource allocation place the system into a safe posture.
Mitigation MIT-47
Strategy: Resource Limitation
- Use quotas or other resource-limiting settings provided by the operating system or environment. For example, when managing system resources in POSIX, setrlimit() can be used to set limits for certain types of resources, and getrlimit() can determine how many resources are available. However, these functions are not available on all operating systems.
- When the current levels get close to the maximum that is defined for the application (see CWE-770), then limit the allocation of further resources to privileged users; alternately, begin releasing resources for less-privileged users. While this mitigation may protect the system from attack, it will not necessarily stop attackers from adversely impacting other users.
- Ensure that the application performs the appropriate error checks and error handling in case resources become unavailable (CWE-703).
CAPEC-125: Flooding
An adversary consumes the resources of a target by rapidly engaging in a large number of interactions with the target. This type of attack generally exposes a weakness in rate limiting or flow. When successful this attack prevents legitimate users from accessing the service and can cause the target to crash. This attack differs from resource depletion through leaks or allocations in that the latter attacks do not rely on the volume of requests made to the target but instead focus on manipulation of the target's operations. The key factor in a flooding attack is the number of requests the adversary can make in a given period of time. The greater this number, the more likely an attack is to succeed against a given target.
CAPEC-130: Excessive Allocation
An adversary causes the target to allocate excessive resources to servicing the attackers' request, thereby reducing the resources available for legitimate services and degrading or denying services. Usually, this attack focuses on memory allocation, but any finite resource on the target could be the attacked, including bandwidth, processing cycles, or other resources. This attack does not attempt to force this allocation through a large number of requests (that would be Resource Depletion through Flooding) but instead uses one or a small number of requests that are carefully formatted to force the target to allocate excessive resources to service this request(s). Often this attack takes advantage of a bug in the target to cause the target to allocate resources vastly beyond what would be needed for a normal request.
CAPEC-147: XML Ping of the Death
An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
CAPEC-197: Exponential Data Expansion
An adversary submits data to a target application which contains nested exponential data expansion to produce excessively large output. Many data format languages allow the definition of macro-like structures that can be used to simplify the creation of complex structures. However, this capability can be abused to create excessive demands on a processor's CPU and memory. A small number of nested expansions can result in an exponential growth in demands on memory.
CAPEC-229: Serialized Data Parameter Blowup
This attack exploits certain serialized data parsers (e.g., XML, YAML, etc.) which manage data in an inefficient manner. The attacker crafts an serialized data file with multiple configuration parameters in the same dataset. In a vulnerable parser, this results in a denial of service condition where CPU resources are exhausted because of the parsing algorithm. The weakness being exploited is tied to parser implementation and not language specific.
CAPEC-230: Serialized Data with Nested Payloads
Applications often need to transform data in and out of a data format (e.g., XML and YAML) by using a parser. It may be possible for an adversary to inject data that may have an adverse effect on the parser when it is being processed. Many data format languages allow the definition of macro-like structures that can be used to simplify the creation of complex structures. By nesting these structures, causing the data to be repeatedly substituted, an adversary can cause the parser to consume more resources while processing, causing excessive memory consumption and CPU utilization.
CAPEC-231: Oversized Serialized Data Payloads
An adversary injects oversized serialized data payloads into a parser during data processing to produce adverse effects upon the parser such as exhausting system resources and arbitrary code execution.
CAPEC-469: HTTP DoS
An attacker performs flooding at the HTTP level to bring down only a particular web application rather than anything listening on a TCP/IP connection. This denial of service attack requires substantially fewer packets to be sent which makes DoS harder to detect. This is an equivalent of SYN flood in HTTP. The idea is to keep the HTTP session alive indefinitely and then repeat that hundreds of times. This attack targets resource depletion weaknesses in web server software. The web server will wait to attacker's responses on the initiated HTTP sessions while the connection threads are being exhausted.
CAPEC-482: TCP Flood
An adversary may execute a flooding attack using the TCP protocol with the intent to deny legitimate users access to a service. These attacks exploit the weakness within the TCP protocol where there is some state information for the connection the server needs to maintain. This often involves the use of TCP SYN messages.
CAPEC-486: UDP Flood
An adversary may execute a flooding attack using the UDP protocol with the intent to deny legitimate users access to a service by consuming the available network bandwidth. Additionally, firewalls often open a port for each UDP connection destined for a service with an open UDP port, meaning the firewalls in essence save the connection state thus the high packet nature of a UDP flood can also overwhelm resources allocated to the firewall. UDP attacks can also target services like DNS or VoIP which utilize these protocols. Additionally, due to the session-less nature of the UDP protocol, the source of a packet is easily spoofed making it difficult to find the source of the attack.
CAPEC-487: ICMP Flood
An adversary may execute a flooding attack using the ICMP protocol with the intent to deny legitimate users access to a service by consuming the available network bandwidth. A typical attack involves a victim server receiving ICMP packets at a high rate from a wide range of source addresses. Additionally, due to the session-less nature of the ICMP protocol, the source of a packet is easily spoofed making it difficult to find the source of the attack.
CAPEC-488: HTTP Flood
An adversary may execute a flooding attack using the HTTP protocol with the intent to deny legitimate users access to a service by consuming resources at the application layer such as web services and their infrastructure. These attacks use legitimate session-based HTTP GET requests designed to consume large amounts of a server's resources. Since these are legitimate sessions this attack is very difficult to detect.
CAPEC-489: SSL Flood
An adversary may execute a flooding attack using the SSL protocol with the intent to deny legitimate users access to a service by consuming all the available resources on the server side. These attacks take advantage of the asymmetric relationship between the processing power used by the client and the processing power used by the server to create a secure connection. In this manner the attacker can make a large number of HTTPS requests on a low provisioned machine to tie up a disproportionately large number of resources on the server. The clients then continue to keep renegotiating the SSL connection. When multiplied by a large number of attacking machines, this attack can result in a crash or loss of service to legitimate users.
CAPEC-490: Amplification
An adversary may execute an amplification where the size of a response is far greater than that of the request that generates it. The goal of this attack is to use a relatively few resources to create a large amount of traffic against a target server. To execute this attack, an adversary send a request to a 3rd party service, spoofing the source address to be that of the target server. The larger response that is generated by the 3rd party service is then sent to the target server. By sending a large number of initial requests, the adversary can generate a tremendous amount of traffic directed at the target. The greater the discrepancy in size between the initial request and the final payload delivered to the target increased the effectiveness of this attack.
CAPEC-491: Quadratic Data Expansion
An adversary exploits macro-like substitution to cause a denial of service situation due to excessive memory being allocated to fully expand the data. The result of this denial of service could cause the application to freeze or crash. This involves defining a very large entity and using it multiple times in a single entity substitution. CAPEC-197 is a similar attack pattern, but it is easier to discover and defend against. This attack pattern does not perform multi-level substitution and therefore does not obviously appear to consume extensive resources.
CAPEC-493: SOAP Array Blowup
An adversary may execute an attack on a web service that uses SOAP messages in communication. By sending a very large SOAP array declaration to the web service, the attacker forces the web service to allocate space for the array elements before they are parsed by the XML parser. The attacker message is typically small in size containing a large array declaration of say 1,000,000 elements and a couple of array elements. This attack targets exhaustion of the memory resources of the web service.
CAPEC-494: TCP Fragmentation
An adversary may execute a TCP Fragmentation attack against a target with the intention of avoiding filtering rules of network controls, by attempting to fragment the TCP packet such that the headers flag field is pushed into the second fragment which typically is not filtered.
CAPEC-495: UDP Fragmentation
An attacker may execute a UDP Fragmentation attack against a target server in an attempt to consume resources such as bandwidth and CPU. IP fragmentation occurs when an IP datagram is larger than the MTU of the route the datagram has to traverse. Typically the attacker will use large UDP packets over 1500 bytes of data which forces fragmentation as ethernet MTU is 1500 bytes. This attack is a variation on a typical UDP flood but it enables more network bandwidth to be consumed with fewer packets. Additionally it has the potential to consume server CPU resources and fill memory buffers associated with the processing and reassembling of fragmented packets.
CAPEC-496: ICMP Fragmentation
An attacker may execute a ICMP Fragmentation attack against a target with the intention of consuming resources or causing a crash. The attacker crafts a large number of identical fragmented IP packets containing a portion of a fragmented ICMP message. The attacker these sends these messages to a target host which causes the host to become non-responsive. Another vector may be sending a fragmented ICMP message to a target host with incorrect sizes in the header which causes the host to hang.
CAPEC-528: XML Flood
An adversary may execute a flooding attack using XML messages with the intent to deny legitimate users access to a web service. These attacks are accomplished by sending a large number of XML based requests and letting the service attempt to parse each one. In many cases this type of an attack will result in a XML Denial of Service (XDoS) due to an application becoming unstable, freezing, or crashing.