VDB
CVE-2026-77403
CVE-2026-77403
PUBLISHED
CVSS 8.9 HIGH
Reported by GitHub_M · Published September 16, 2026
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.
Risk Scores
CVSS 4.0
8.9
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| rabbitmq | amqp091-go | < 1.13.0 |
| github.com | rabbitmq/amqp091-go | 0 |
| rabbitmq | amqp091-go | 0 |
Timeline
- Sep 16, 2026 Coalition ESS Score
- Sep 16, 2026 CVE Published
- Sep 17, 2026 CVE Updated
- Sep 17, 2026 EPSS Score
- Sep 18, 2026 EPSS Score
- Sep 24, 2026 EPSS Score
- Sep 26, 2026 EPSS Score
- Sep 30, 2026 EPSS Score
- Oct 2, 2026 EPSS Score
- Oct 6, 2026 EPSS Score
- Oct 8, 2026 EPSS Score
- Oct 11, 2026 EPSS Score
References
- https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-xwwf-m8fg-p9q2 x_refsource_CONFIRM
- https://github.com/rabbitmq/amqp091-go/pull/353 x_refsource_MISC
- https://github.com/rabbitmq/amqp091-go/commit/2e0a919b89f337dbf58db2bb34ab206dac354a06 x_refsource_MISC
- https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-77403 advisory
- https://github.com/advisories/GHSA-xwwf-m8fg-p9q2 advisory