CVE-2026-67404
Publication date 23 September 2026
Last updated 17 October 2026
Ubuntu priority
Description
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, When no CA bundle is available, ssl_options/1 falls back to [{verify, verify_none}] with no warning. An attacker in a man-in-the-middle position can forge the JWKS response, which leads the broker to accept arbitrary JWTs. Preconditions include The OAuth2 plugin must be in use with no cacertfile configured and the OS CA bundle empty or unreadable (for example, in a minimal container), and the attacker must hold a network man-in-the-middle position.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| rabbitmq-server | 26.10 stonking |
Not affected
|
| 26.04 LTS resolute |
Fixed in 4.0.5-10ubuntu5.2
|
|
| 24.04 LTS noble |
Fixed in 3.12.1-1ubuntu1.7
|
|
| 22.04 LTS jammy |
Fixed in 3.9.27-0ubuntu0.6
|
|
| 20.04 LTS focal |
Fixed in 3.8.3-0ubuntu0.3+esm2
|
|
| 18.04 LTS bionic |
Fixed in 3.6.10-1ubuntu0.5+esm1
|
|
| 16.04 LTS xenial |
Fixed in 3.5.7-1ubuntu0.16.04.4+esm3
|
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CVSS version: CVSS v4.0
Base score
9.2 · Critical
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8933-1
- RabbitMQ Server vulnerabilities
- 15 October 2026