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  4. CVE 2026 77408 rabbitmq amqp091 go silent data truncation and
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Critical · CVSS 0.0CVE-2026-77408GHSA-J497-X9HR-X34X

RabbitMQ amqp091-go: Silent Data Truncation and State Corruption via Shortstr Integer OverflowCVE-2026-77408

Answer in brief

CVE-2026-77408 records a Critical severity (CVSS 0.0) vulnerability in RabbitMQ amqp091-go: Silent Data Truncation and State Corruption via Shortstr Integer Overflow. The current sources do not mark it as known exploited. The current feed maps rabbitmq/amqp091-go (generic), github.com/rabbitmq/amqp091-go (go), github.com/rabbitmq/amqp091-go (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Oct 1, 2026Source checked Oct 31, 2026First seen by HOL Sep 16, 2026Material review Oct 1, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 0.0
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 0.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rabbitmq/amqp091-go (generic), github.com/rabbitmq/amqp091-go (go), github.com/rabbitmq/amqp091-go (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
rabbitmq/amqp091-gogeneric<1.13.01.13.0
github.com/rabbitmq/amqp091-gogo<1.13.01.13.0
github.com/rabbitmq/amqp091-gogo>=0 <1.13.01.13.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for rabbitmq/amqp091-go, github.com/rabbitmq/amqp091-go, github.com/rabbitmq/amqp091-go.
  2. 2Review the reported fix. Update rabbitmq/amqp091-go to 1.13.0; github.com/rabbitmq/amqp091-go to 1.13.0; github.com/rabbitmq/amqp091-go to 1.13.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 16, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
  • GitHub security advisorygithub.com
Upstream source description

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, the writeShortstr function in write.go casts the byte length of AMQP shortstr property values to uint8 without first rejecting values longer than 255 bytes. An application that accepts an oversized CorrelationId, ReplyTo, MessageId, Expiration, UserId, AppId, ContentType, ContentEncoding, or Type value can therefore serialize a wrapped length and only a truncated prefix, while reporting no error. The resulting silent metadata corruption can break request and reply correlation, routing, tracing, and downstream message processing. This issue is fixed in version 1.13.0.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-190
Source
CVE List V5
Source checked
Oct 31, 2026
References
7 linked sources
Open source record