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CVE-2026-77408
Published:September 16, 2026
Updated:September 22, 2026
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.
Affected Packages
https://github.com/rabbitmq/amqp091-go.git (GITHUB):
Affected version(s) >=v1.1.0 <v1.13.0
Fix Suggestion:
Update to version v1.13.0
github.com/rabbitmq/amqp091-go (GO):
Affected version(s) >=v1.1.0 <v1.13.0
Fix Suggestion:
Update to version v1.13.0
github.com/rabbitmq/amqp091-go (GO):
Affected version(s) >=a1a3ba3c77697420d7055371d5c5c6bd1f0e3d66 <v1.13.0
Fix Suggestion:
Update to version v1.13.0
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CVSS v4
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
LOW
Subsequent System Integrity
HIGH
Subsequent System Availability
LOW
CVSS v3
Base Score:
10
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Integer Overflow or Wraparound
EPSS
Base Score:
0.41