CVE-2026-77408Critical· 9.1▾ MidnightRabbitMQ 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 t…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 50.1 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.4%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/rabbitmq/amqp091-go < 1.13.0Patched in:
github.com/rabbitmq/amqp091-go 1.13.0Connected by shared product, vendor, weakness, or advisory.
CVE-2026-77406High· 8.2RabbitMQ amqp091-go is a Go AMQP 0.9.1 client
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CVE-2026-77403High· 8.9RabbitMQ amqp091-go is a Go AMQP 0.9.1 client
CVE-2026-77410High· 8.9RabbitMQ amqp091-go is a Go AMQP 0.9.1 client
CVE-2026-77404High· 8.7RabbitMQ amqp091-go is a Go AMQP 0.9.1 client
CVE-2026-77412High· 8.9RabbitMQ amqp091-go is a Go AMQP 0.9.1 client