CVSS 4.0
8.9 highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:HCVE-2026-77403
High (8.9). EPSS 0.5% chance of exploitation in the next 30 days. Fixed in github.com/rabbitmq/amqp091-go 1.13.0.
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.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
- CWE
- CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xwwf-m8fg-p9q2 | Go | github.com/rabbitmq/amqp091-go | <1.13.0 | 1.13.0 |
| GO-2026-6503 | Go | github.com/rabbitmq/amqp091-go | <1.13.0 | 1.13.0 |