CVE catalog
CVE-2026-67236
RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, a successful POST /login caused is_authorized/2 to set an auth cookie containing base64-encoded username:password creden
- Severity
- Critical · CVSS 9.2
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.17% · Oct 25, 2026
RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, a successful POST /login caused is_authorized/2 to set an auth cookie containing base64-encoded username:password credentials without HttpOnly, Secure, SameSite, or expiration protections. Because base64 is encoding rather than encryption, an attacker with same-origin cross-site scripting, an HTTP-readable network position, or local access to the browser cookie store could recover the actual login credentials; older browsers that treated an absent SameSite attribute as None also sent the cookie cross-site. This issue is fixed in versions 4.2.8 and 4.3.2.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | rabbitmq-server | sid | 4.3.6-1 | fixed |
| Debian | rabbitmq-server | forky | 4.3.6-1 | fixed |
| Debian | rabbitmq-server | trixie | 4.0.5-6+deb13u2 | not affected |
| Debian | rabbitmq-server | bookworm | 3.10.8-1.1+deb12u1 | not affected |
| Debian | rabbitmq-server | bookworm-security | 3.10.8-1.1+deb12u1 | not affected |
| Ubuntu | rabbitmq-server | noble | 3.12.1-1ubuntu1.7 | fixed |
| Cpe | rabbitmq_server | Not reported | 4.3.2 | fixed |
| Bitnami | rabbitmq | Not reported | 4.2.8 | fixed |
| Bitnami | rabbitmq | Not reported | 4.3.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | rabbitmq-server | source | sid | 4.3.2-1 | not yet assigned | Not reported | Not reported |
| Debian | rabbitmq-server | source | forky | 4.3.2-1 | not yet assigned | Not reported | Not reported |
| Debian | rabbitmq-server | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | rabbitmq-server | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Ubuntu | rabbitmq-server | deb | noble | 3.12.1-1ubuntu1.7 | Not reported | Not reported | Not reported |
| Cpe | rabbitmq_server | cpe | Not reported | 4.3.2 | Not reported | NVD-CVE-2026-67236 | Not reported |
| Bitnami | rabbitmq | Bitnami | Not reported | 4.2.8 | Not reported | BIT-RABBITMQ-2026-67236 | Not reported |
| Bitnami | rabbitmq | Bitnami | Not reported | 4.3.2 | Not reported | BIT-RABBITMQ-2026-67236 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [rabbitmq-server]Not affected
Details (4)
3.10.8-1.1+deb12u1· all · bookwormNot affected
nvd · rabbitmq-server · debian · bookworm
3.10.8-1.1+deb12u1· all · bookwormNot affected
nvd · rabbitmq-server · debian · bookworm
3.10.8-1.1+deb12u1· all · bookworm-securityNot affected
nvd · rabbitmq-server · debian · bookworm
3.10.8-1.1+deb12u1· all · bookworm-securityNot affected
nvd · rabbitmq-server · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-67236]
- [https://osv.dev/vulnerability/BIT-rabbitmq-2026-67236]
- [https://security-tracker.debian.org/tracker/CVE-2026-67236]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67236.json]
- [https://ubuntu.com/security/notices/USN-8933-1]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]