CVE-2026-67236
published 2026-09-25CVE-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…
PriorityP337medium6.5CVSS 3.1
AVNACLPRLUINSUCHINAN
EPSS
0.14%
3.0th percentile
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.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| broadcom | rabbitmq_server | >= 4.2.0 < 4.2.8 | 4.2.8 |
| broadcom | rabbitmq_server | >= 4.3.0 < 4.3.2 | 4.3.2 |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| ubuntu | rabbitmq-server | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
nvdv4.08.2HIGHCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/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
vendor_redhat8.2HIGH
vendor_ubuntu7.6HIGH
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Ubuntu
RabbitMQ Server vulnerabilities
vendor_ubuntu·2026-10-15·CVSS 7.6
CVE-2026-67404 [HIGH] RabbitMQ Server vulnerabilities
Title: RabbitMQ Server vulnerabilities
Summary: Several security issues were fixed in RabbitMQ Server.
It was discovered that RabbitMQ Server incorrectly handled CORS wildcard
origin configuration. An attacker could possibly use this issue to cause
a cross-site request forgery attack. This issue only affected Ubuntu 18.04
LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04
LTS. (CVE-2026-66070)
It was discovered that RabbitMQ Server incorrectly handled TLS
peer-certificate DNs in the management UI. An attacker could possibly use
this issue to cause a cross-site scripting attack. (CVE-2026-66077)
It was discovered that RabbitMQ Server incorrectly handled AMQP 1.0 arrays
with zero-width element constructors. An attacker could possibly use this
issue to cause a den
Red Hat
rabbitmq-server: rabbitmq-server: Information disclosure via insecure authentication cookies
vendor_redhat·2026-09-25·CVSS 8.2
CVE-2026-67236 [HIGH] CWE-312 rabbitmq-server: rabbitmq-server: Information disclosure via insecure authentication cookies
rabbitmq-server: rabbitmq-server: Information disclosure via insecure authentication cookies
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.
A flaw was found in rabbitmq-server. This vulnerability allows i
No detection rules found.
No public exploits indexed.
https://github.com/rabbitmq/rabbitmq-server/commit/df9e7f4c0afd311a672705f020d301efad355745https://github.com/rabbitmq/rabbitmq-server/commit/edf1fbc7217aaf736955d2e13c9534901a2e0778https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.8https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.2https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-88vh-gx85-p36m
2026-09-25
Published