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Advisory record · GHSA-j497-x9hr-x34x

RabbitMQ amqp091-go: Silent Data Truncation and State Corruption via Shortstr Integer Overflow

CVSS 9.1 CriticalCriticalEPSS 0.0052 · 44th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 17 Sept 2026, 17:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/rabbitmq/amqp091-goGo<1.13.01.13.0
Identifiers
GHSA-j497-x9hr-x34x · CVE-2026-77408 · GO-2026-6498
Weakness (CWE)
CWE-190
Tags
Published
17 Sept 2026
Updated
1 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The amqp091-go Go package (RabbitMQ AMQP client) before 1.13.0 silently truncates AMQP short string property fields longer than 255 bytes, such as CorrelationId, ReplyTo, MessageId, and ContentType, when encoding them for publishing. An attacker who can influence these values through an application, for example by supplying an overly long identifier, can cause silent data corruption, broken request-reply routing, and messages dropped or misdelivered downstream. Upgrade to version 1.13.0 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.1 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0052, the 44th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:12 UTC First seen by agentprime
  2. 31 Oct 2026, 14:12 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.