Vulnerability · Published Sep 16, 2026 · Assigned by GitHub_M
CVE-2026-77412RabbitMQ amqp091-go: Denial of Service via Malicious Field Length in AMQP Client
High 8.9
In plain English
A high-severity security flaw in amqp091-go from rabbitmq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, readField in read.go reads the length of an AMQP byte-array field with type tag x into a signed int32 and passes the value directly to make when allocating the field buffer. A malicious or compromised broker can encode a value such as 0xFFFFFFFF, which becomes -1 and causes a len out of range runtime panic. The panic escapes the network reader goroutine and terminates the client process, including during connection.start server properties or message header table parsing. This issue is fixed in version 1.13.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | golang-github-rabbitmq-amqp091-go | no fix listed | DEBIAN-CVE-2026-77412 |
| Debian:13 | golang-github-rabbitmq-amqp091-go | no fix listed | DEBIAN-CVE-2026-77412 |
| Debian:14 | golang-github-rabbitmq-amqp091-go | 1.14.0-1 | DEBIAN-CVE-2026-77412 |
| Go | github.com/rabbitmq/amqp091-go | 1.13.0 | GO-2026-6494 |
| Go | github.com/rabbitmq/amqp091-go | 1.13.0 | GHSA-4v58-74mf-rjx3 |
| Ubuntu:24.04:LTS | golang-github-rabbitmq-amqp091-go | no fix listed | UBUNTU-CVE-2026-77412 |
| Ubuntu:26.04:LTS | golang-github-rabbitmq-amqp091-go | no fix listed | UBUNTU-CVE-2026-77412 |
| Ubuntu:26.10 | golang-github-rabbitmq-amqp091-go | no fix listed | UBUNTU-CVE-2026-77412 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| rabbitmq | amqp091-go | < 1.13.0 |
Weakness: CWE-681 · Vector: 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
References
- https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-4v58-74mf-rjx3 x_refsource_CONFIRM
- https://github.com/rabbitmq/amqp091-go/pull/344 x_refsource_MISC
- https://github.com/rabbitmq/amqp091-go/commit/669b42bf7b1db76bc6d4973e3634247f680accbf x_refsource_MISC
- https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0 x_refsource_MISC