Common Weakness Enumeration
CWE-405
Allowed-with-ReviewAsymmetric Resource Consumption (Amplification)
Abstraction: Class · Status: Incomplete
The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."
93 vulnerabilities reference this CWE, most recent first.
CVE-2026-72914 (GCVE-0-2026-72914)
Vulnerability from cvelistv5 – Published: 2026-08-10 21:13 – Updated: 2026-08-11 13:24
VLAI
EPSS
VEX
Title
Mastodon: Exhausting data by an unauthenticated request to the admin retention API
Summary
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, the administrative statistics endpoints handled by Api::V1::Admin::MeasuresController and Api::V1::Admin::RetentionController checked authorization only after beginning expensive calculations. Anonymous callers could submit keys, start_at, and end_at parameters that caused long-running SQL queries in Admin::Metrics::Measure, Admin::Metrics::Retention, and Admin::Metrics::Dimension::BaseDimension, allowing repeated requests to exhaust server resources. This issue is fixed in versions 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 13:24 UTC
CWE
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/mastodon/mastodon/security/adv… | x_refsource_CONFIRM |
| https://github.com/mastodon/mastodon/commit/18c61… | x_refsource_MISC |
| https://github.com/mastodon/mastodon/commit/467c9… | x_refsource_MISC |
| https://github.com/mastodon/mastodon/commit/930aa… | x_refsource_MISC |
| https://github.com/mastodon/mastodon/commit/da47a… | x_refsource_MISC |
| https://github.com/mastodon/mastodon/releases/tag… | x_refsource_MISC |
| https://github.com/mastodon/mastodon/releases/tag… | x_refsource_MISC |
| https://github.com/mastodon/mastodon/releases/tag… | x_refsource_MISC |
| https://github.com/mastodon/mastodon/releases/tag… | x_refsource_MISC |
Impacted products
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CVE-2026-54874 (GCVE-0-2026-54874)
Vulnerability from cvelistv5 – Published: 2026-08-25 12:59 – Updated: 2026-08-25 14:28
VLAI
EPSS
VEX
Title
Excessive Memory Use Buffering DTLS Records for a Future Epoch
Summary
Issue summary: Receiving a DTLS record for a future epoch while a handshake
is in progress causes OpenSSL to buffer far more memory than the record
itself requires.
Impact summary: A peer can use a small amount of network traffic to make an
OpenSSL DTLS endpoint retain a disproportionately large amount of memory,
which may lead to a Denial of Service.
CWE: CWE-405: Asymmetric Resource Consumption (Amplification)
Description: While a DTLS handshake is in progress, a peer may legitimately
have already moved on to the next epoch (for example, having sent its
ChangeCipherSpec and Finished messages) before the local endpoint has
processed the same transition, typically because of reordering on the
underlying UDP transport. OpenSSL buffers such early records so that they
can be processed once the local endpoint catches up.
Buffering a record currently retains the entire read buffer it arrived in,
which is sized to hold the largest possible DTLS record (around 16
kilobytes), rather than just the bytes that make up the record itself. Up
to 100 such records may be buffered per connection. As a result, a peer
that sends a stream of small forged records claiming to belong to the next
epoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of
memory, despite sending only a small fraction of that amount of data over
the network.
An attacker therefore gains a memory amplification factor of around 1200,
and can multiply the effect across as many associations as it is able to
open, making this a remote memory exhaustion Denial of Service risk for
DTLS servers. Since the memory retained per connection remains bounded,
and any limit an application already places on the number of concurrent
associations also bounds the total exposure, this issue has been assessed
as Low severity.
FIPS impact: no
No FIPS modules are affected by this issue as the affected code is outside
the OpenSSL FIPS module boundary.
OpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this
issue.
OpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.
OpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.
OpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.
OpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.
OpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.
Premium support customers only:
OpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi
OpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr
This issue was reported on 18 May 2026 by Amazon Web Services.
The fix has been developed by Matt Caswell.
-- cut (non-publishing metadata for internal use) --
Reported by: Amazon Web Services
Fixed by: Matt Caswell
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:28 UTC
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
6 references
Impacted products
Date Public
2026-08-25 11:36
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CVE-2026-54224 (GCVE-0-2026-54224)
Vulnerability from cvelistv5 – Published: 2026-06-18 12:56 – Updated: 2026-06-18 13:09
VLAI
EPSS
VEX
Title
Denial of Service in UBB.threads
Summary
UBB.threads is vulnerable to Denial of Service (DoS). By sending multiple concurrent requests to view any user profile on instances with many registered users, an authenticated attacker can easily exhaust database resources and completely deny access to the application for other users.
Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 13:09 UTC
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.ubbcentral.com/ | product |
| https://cert.pl/en/posts/2026/06/CVE-2026-54219 | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| UBB Systems | UBB.threads |
Affected:
0 , ≤ 7.7.5
(semver)
|
Date Public
2026-06-18 12:56
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CVE-2026-47774 (GCVE-0-2026-47774)
Vulnerability from cvelistv5 – Published: 2026-06-17 16:58 – Updated: 2026-08-24 12:07
VLAI
EPSS
VEX
Title
Envoy vulnerable to HTTP/2 memory exhaustion via cookie header size bypass and HPACK amplification
Summary
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Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 18:00 UTC
CWE
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| http://www.openwall.com/lists/oss-security/2026/0… | |
| https://access.redhat.com/security/cve/CVE-2026-47774 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2487465 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:27114 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26210 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26222 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26231 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26247 | vendor-advisoryx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.35.11
Affected: >= 1.36.0, < 1.36.7 Affected: >= 1.37.0, < 1.37.3 Affected: >= 1.38.0, < 1.38.1 |
|
| Red Hat | Red Hat OpenShift Service Mesh 2.6 |
Unaffected:
1781604724 , < *
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cpe:/a:redhat:service_mesh:2.6::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.0 |
Unaffected:
1781069908 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.0::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.1 |
Unaffected:
1781070158 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.1::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.2 |
Unaffected:
1781070967 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.2::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.3 |
Unaffected:
1781094520 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.3::el9 |
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CVE-2026-45557 (GCVE-0-2026-45557)
Vulnerability from cvelistv5 – Published: 2026-05-19 13:47 – Updated: 2026-05-19 14:57
VLAI
EPSS
VEX
Title
Technitium DNS Server excessive DNSSEC requests
Summary
Technitium DNS Server aggressively tries to fetch missing RRSIG records or mismatched DNSKEY records. An attacker in control of a domain can cause a vulnerable system to generate excessive network traffic. Fixed in 15.0.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · cisa-cg (v2.0.3)
Decision recorded 2026-05-18 22:28 UTC
CWE
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Technitium | DNS Server |
Affected:
0 , < 15.0
(custom)
Unaffected: 15.0 |
Date Public
2026-05-19 00:00
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CVE-2026-44296 (GCVE-0-2026-44296)
Vulnerability from cvelistv5 – Published: 2026-05-12 20:52 – Updated: 2026-05-13 12:18
VLAI
EPSS
VEX
Title
Deskflow: TLS multiplexer DoS on failed `SSL_accept`
Summary
Deskflow is a keyboard and mouse sharing app. Prior to 1.26.0.167, a remote, unauthenticated denial of service (DoS) vulnerability affects Deskflow servers running with TLS enabled (the default). When any TCP peer connects to the listening port and its first bytes do not parse as a valid TLS ClientHello, SecureSocket::secureAccept enters its fatal-error branch and calls Arch::sleep(1) (a blocking 1-second sleep) on the multiplexer worker thread. That thread services every socket on the server, including established TLS clients delivering mouse motion, keyboard events, and clipboard updates. A single failed handshake therefore stalls input delivery to all connected screens for ~1 second, and a sustained drip of malformed connections (≥ 1/s) makes the server effectively unusable while the attack persists. This vulnerability is fixed in 1.26.0.167.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 12:14 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/deskflow/deskflow/security/adv… | x_refsource_CONFIRM |
| https://github.com/deskflow/deskflow/commit/32978… | x_refsource_MISC |
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CVE-2026-35665 (GCVE-0-2026-35665)
Vulnerability from cvelistv5 – Published: 2026-04-10 16:03 – Updated: 2026-06-23 16:16 X_Open Source
VLAI
EPSS
VEX
Title
OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing
Summary
OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature verification. An unauthenticated attacker can exhaust server connection resources by sending concurrent slow HTTP POST requests to the Feishu webhook endpoint, blocking legitimate webhook deliveries.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-10 16:57 UTC
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/openclaw/openclaw/security/adv… | vendor-advisory |
| https://www.vulncheck.com/advisories/openclaw-den… | third-party-advisory |
Impacted products
Date Public
2026-03-27 00:00
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CVE-2026-35626 (GCVE-0-2026-35626)
Vulnerability from cvelistv5 – Published: 2026-04-09 21:26 – Updated: 2026-06-23 16:15 X_Open Source
VLAI
EPSS
VEX
Title
OpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call Webhook
Summary
OpenClaw before 2026.3.22 contains an unauthenticated resource exhaustion vulnerability in voice call webhook handling that buffers request bodies before provider signature checks. Attackers can send large or malicious webhook requests to exhaust server resources without authentication by bypassing signature validation.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 03:08 UTC
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/openclaw/openclaw/security/adv… | vendor-advisory |
| https://github.com/openclaw/openclaw/commit/630f1… | patch |
| https://github.com/openclaw/openclaw/commit/651dc… | patch |
| https://www.vulncheck.com/advisories/openclaw-una… | third-party-advisory |
Impacted products
Date Public
2026-03-24 00:00
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CVE-2026-25611 (GCVE-0-2026-25611)
Vulnerability from cvelistv5 – Published: 2026-02-10 17:52 – Updated: 2026-02-11 15:21
VLAI
EPSS
VEX
Title
Pre-Authentication Memory Exhaustion Denial of Service in MongoDB Server
Summary
A series of specifically crafted, unauthenticated messages can exhaust available memory and crash a MongoDB server.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-11 15:20 UTC
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB Inc | MongoDB Server |
Affected:
8.2 , < 8.2.4
(semver)
Affected: 8.0 , < 8.0.18 (semver) Affected: 7.0 , < 7.0.29 (semver) |
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CVE-2026-24324 (GCVE-0-2026-24324)
Vulnerability from cvelistv5 – Published: 2026-02-10 03:04 – Updated: 2026-02-10 16:17
VLAI
EPSS
VEX
Title
Denial of service (DOS) vulnerability in SAP BusinessObjects Business Intelligence Platform (AdminTools)
Summary
SAP BusinessObjects Business Intelligence Platform (AdminTools) allows an authenticated attacker with user privileges to execute a specific query in AdminTools that could cause the Content Management Server (CMS) to crash, rendering the CMS partially or completely unavailable and resulting in the denial of service of the Content Management Server (CMS). Successful exploitation impacts system availability, while confidentiality and integrity remain unaffected.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-10 16:16 UTC
CWE
- CWE-405 - Asymmetric Resource Consumption
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SAP_SE | SAP BusinessObjects Business Intelligence Platform (AdminTools) |
Affected:
ENTERPRISE 430
Affected: 2025 Affected: 2027 |
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Mitigation
Architecture and Design
An application must make resources available to a client commensurate with the client's access level.
Mitigation
Architecture and Design
An application must, at all times, keep track of allocated resources and meter their usage appropriately.
Mitigation
System Configuration
Consider disabling resource-intensive algorithms on the server side, such as Diffie-Hellman key exchange.
No CAPEC attack patterns related to this CWE.