CVE-2026-77403
RabbitMQ amqp091-go: Denial of Service via Sub-Spec Frame Size Negotiation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | rabbitmq |
| Product | amqp091-go |
| Published | Sep 16, 2026 |
| Last Updated | Sep 16, 2026 |
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Affected Versions
rabbitmq / amqp091-go
< 1.13.0
References
github.com: https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-xwwf-m8fg-p9q2 github.com: https://github.com/rabbitmq/amqp091-go/pull/353 github.com: https://github.com/rabbitmq/amqp091-go/commit/2e0a919b89f337dbf58db2bb34ab206dac354a06 github.com: https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0