High severityNVD Advisory· Published Sep 16, 2026· Updated Sep 23, 2026
CVE-2026-77403
CVE-2026-77403
Description
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Connection.openTune in connection.go accepts a server-advertised FrameMax below the AMQP frameMinSize value of 4096 bytes because the connection negotiation loop does not enforce the protocol minimum. A malicious or compromised AMQP broker can therefore advertise an extremely small FrameMax, causing later client publications to be fragmented into excessive numbers of frames and write operations. This can consume CPU and stall the client or its host. This issue is fixed in version 1.13.0.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/rabbitmq/amqp091-goGo | < 1.13.0 | 1.13.0 |
Affected products
2<1.13.0+ 1 more
- (no CPE)range: <1.13.0
- (no CPE)
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-xwwf-m8fg-p9q2ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-77403ghsaADVISORY
- github.com/rabbitmq/amqp091-go/commit/2e0a919b89f337dbf58db2bb34ab206dac354a06nvdWEB
- github.com/rabbitmq/amqp091-go/pull/353nvdWEB
- github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0nvdWEB
- github.com/rabbitmq/amqp091-go/security/advisories/GHSA-xwwf-m8fg-p9q2nvdWEB
News mentions
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