Vulnerability-Lookup

CVE-2026-77410 (GCVE-0-2026-77410)

Vulnerability from cvelistv5 – Published: 2026-09-16 14:39 – Updated: 2026-09-16 15:41

Title

RabbitMQ amqp091-go: Resource Exhaustion (OOM) via Unbounded Body Buffer Allocation

Summary

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.recvContent in channel.go preallocates the message body slice with the uint64 ch.header.Size value supplied by an AMQP content header without capping the allocation to the negotiated Connection.Config.FrameSize value. A malicious or compromised broker can send an extreme declared body size and cause the Go runtime to attempt a correspondingly large allocation before body data is received. The allocation can exhaust memory and terminate the client process. This issue is fixed in version 1.13.0.

Severity

8.9 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-16 15:40 UTC

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/rabbitmq/amqp091-go/security/a…	x_refsource_CONFIRM
https://github.com/rabbitmq/amqp091-go/pull/346	x_refsource_MISC
https://github.com/rabbitmq/amqp091-go/commit/91b…	x_refsource_MISC
https://github.com/rabbitmq/amqp091-go/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
rabbitmq	amqp091-go	Affected: < 1.13.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-77410

Vulnerability from fkie_nvd - Published: 2026-09-16 15:17 - Updated: 2026-09-16 16:17

Severity

8.9 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/rabbitmq/amqp091-go/commit/91b65fa0096a99a580cf51a31b24028ff1c60382
	security-advisories@github.com	https://github.com/rabbitmq/amqp091-go/pull/346
	security-advisories@github.com	https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0
	security-advisories@github.com	https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-r9c8-gcjp-xfwh

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "product": "amqp091-go",
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    }
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GHSA-R9C8-GCJP-XFWH

Vulnerability from github – Published: 2026-09-17 17:04 – Updated: 2026-09-17 17:04

Summary

RabbitMQ amqp091-go: Resource Exhaustion (OOM) via Unbounded Body Buffer Allocation

Details

Summary A flaw in the recvContent function allows a malicious AMQP server to trigger an Out-of-Memory (OOM) error, forcing the host operating system or container runtime to immediately terminate the client process.

Vulnerability Details When receiving message content payloads, the client processes the expected size from the content header framework. The recvContent function attempts to optimize performance by pre-allocating memory for the message body based on the ch.header.Size field, which is a 64-bit unsigned integer (uint64).

// channel.go:495-496
if cap(ch.body) == 0 {
    ch.body = make([]byte, 0, ch.header.Size)  // unbounded
}

The underlying library fails to validate or cap this requested size against any upper boundary—such as the maximum frame size negotiated during connection establishment (FrameMax). If a server specifies an extreme body size (e.g., 2^62 bytes), the Go runtime attempts to allocate an exabyte-scale slice capacity. This immediately exhausts available system memory, causing the operating system's OOM killer to terminate the application.

Attack Vector / Exploitation Scenario

Message Delivery Phase: A malicious or compromised AMQP broker sends a standard basic.deliver frame containing a content header with an intentionally inflated body-size variable.
Authentication Requirement: No special privileges or authentication bypasses are required; the crash occurs seamlessly during normal message consumption.

Impact

Availability: High. Exploded memory consumption results in an instant process termination, destroying application state and availability for all threads sharing the environment.

Severity

8.9 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

Show details on source website

JSON

To clipboard

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  "aliases": [
    "CVE-2026-77410"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-789"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-17T17:04:20Z",
    "nvd_published_at": "2026-09-16T15:17:50Z",
    "severity": "HIGH"
  },
  "details": "**Summary**\nA flaw in the `recvContent` function allows a malicious AMQP server to trigger an Out-of-Memory (OOM) error, forcing the host operating system or container runtime to immediately terminate the client process.\n\n**Vulnerability Details**\nWhen receiving message content payloads, the client processes the expected size from the content header framework. The `recvContent` function attempts to optimize performance by pre-allocating memory for the message body based on the `ch.header.Size` field, which is a 64-bit unsigned integer (`uint64`).\n\n```go\n// channel.go:495-496\nif cap(ch.body) == 0 {\n    ch.body = make([]byte, 0, ch.header.Size)  // unbounded\n}\n```\n\nThe underlying library fails to validate or cap this requested size against any upper boundary\u2014such as the maximum frame size negotiated during connection establishment (`FrameMax`). If a server specifies an extreme body size (e.g., `2^62` bytes), the Go runtime attempts to allocate an exabyte-scale slice capacity. This immediately exhausts available system memory, causing the operating system\u0027s OOM killer to terminate the application.\n\n**Attack Vector / Exploitation Scenario**\n\n- Message Delivery Phase: A malicious or compromised AMQP broker sends a standard `basic.deliver` frame containing a content header with an intentionally inflated `body-size` variable.\n- Authentication Requirement: No special privileges or authentication bypasses are required; the crash occurs seamlessly during normal message consumption.\n\n**Impact**\n\n- Availability: High. Exploded memory consumption results in an instant process termination, destroying application state and availability for all threads sharing the environment.",
  "id": "GHSA-r9c8-gcjp-xfwh",
  "modified": "2026-09-17T17:04:20Z",
  "published": "2026-09-17T17:04:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-r9c8-gcjp-xfwh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77410"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rabbitmq/amqp091-go/pull/346"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rabbitmq/amqp091-go/commit/91b65fa0096a99a580cf51a31b24028ff1c60382"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rabbitmq/amqp091-go"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "RabbitMQ amqp091-go: Resource Exhaustion (OOM) via Unbounded Body Buffer Allocation"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-77410 (GCVE-0-2026-77410)

FKIE_CVE-2026-77410

GHSA-R9C8-GCJP-XFWH

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