CVE-2026-79921: Github.com/rabbitmq/amqp091 go Amqp091-go Has A Potential Memory Vulnerability
HIGHCVE-2026-79921 is a HIGH amqp091-go has a potential memory vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Github.com/rabbitmq/amqp091 go libraries in the Go ecosystem. The issue involves amqp091-go has a potential memory exhaustion/protocol violation via broker-controlled oversized payload. Remediation is available by upgrading affected packages to version 1.13.0.
CVE-2026-79921 at a Glance
How to Fix CVE-2026-79921
To remediate this vulnerability, upgrade all affected Github.com/rabbitmq/amqp091 go dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/rabbitmq/amqp091-go to 1.13.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/rabbitmq/amqp091-goHow to Check if You Are Affected
To determine whether your application is affected by CVE-2026-79921, inspect your project dependencies for Github.com/rabbitmq/amqp091 go:
inspect dependencies for github.com/rabbitmq/amqp091-goAnalyze the terminal output to locate any version of Github.com/rabbitmq/amqp091 go in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.13.0), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where 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. In Github.com/rabbitmq/amqp091 go, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-79921 Affected Github.com/rabbitmq/amqp091 go Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/rabbitmq/amqp091-go
|
Go |
< 1.13.0
|
1.13.0
|
References
Frequently Asked Questions
What is CVE-2026-79921?
Which Github.com/rabbitmq/amqp091 go versions are affected?
What version fixes CVE-2026-79921?
Is github.com/rabbitmq/amqp091-go affected?
What CWE is associated with CVE-2026-79921?
How can I check Go dependencies for CVE-2026-79921?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-6c5v-hqjr-5xxp",
"modified" : "2026-09-03T20:15:13Z",
"published" : "2026-09-03T20:15:13Z",
"aliases" : [ "CVE-2026-79921" ],
"summary" : "amqp091-go has a Potential Memory Exhaustion/Protocol Violation via Broker-Controlled Oversized Payload",
"details" : "**Summary**\nA vulnerability exists in the amqp091-go client library where a compromised or malicious AMQP broker can force the client to allocate resources for and process content body frames that exceed the negotiated frame_max limit. This can lead to unexpected memory consumption or application-layer denial of service (DoS), bypassing the protocol's built-in framing constraints.\n\n**Details**\nDuring a standard AMQP 0-9-1 connection handshake, the client and the broker negotiate a maximum frame size (frame_max), for example, 4096 bytes.\n\nHowever, after negotiation, a malicious broker can send a valid basic.deliver sequence containing a content body frame whose header declares a payload size larger than the negotiated frame_max. Instead of enforcing the agreed-upon limit and closing the connection with a frame-error (as mandated by the AMQP 0-9-1 specification), the amqp091-go client:\n\n1. Accepts the broker-declared oversized frame size.\n2. Allocates memory based on this oversized declaration.\n3. Reads the payload, assembles it into the message, and delivers it to the consumer.\n\n**Impact**\n\n- Denial of Service (DoS): If a broker sends extremely large frame sizes, it can trigger significant memory allocations on the client side, potentially leading to Out-Of-Memory (OOM) crashes.\n- Protocol Violation: The client fails to enforce negotiated connection parameters, trusting the broker implicitly even after constraints have been established.",
"severity" : [ {
"type" : "CVSS_V4",
"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"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/rabbitmq/amqp091-go"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.13.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-6c5v-hqjr-5xxp"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-79921"
}, {
"type" : "WEB",
"url" : "https://github.com/rabbitmq/amqp091-go/pull/353"
}, {
"type" : "WEB",
"url" : "https://github.com/rabbitmq/amqp091-go/commit/6beb7b51f59e46ddcf8066ad498dad32491d3be0"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/rabbitmq/amqp091-go"
}, {
"type" : "WEB",
"url" : "https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-770" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-09-03T20:15:13Z",
"nvd_published_at" : "2026-08-26T21:16:41Z"
}
}