CVE-2026-67420
Description
A flaw was found in rabbitmq-server. When an existing Advanced Message Queuing Protocol (AMQP) connection refreshes its authentication token to one with revoked impersonation privileges, the server fails to update the active session's security tags. As a result, an authenticated user can retain elevated permissions on existing connections and continue publishing messages under another user's identity.
Statement
This vulnerability was introduced in RabbitMQ 3.13.0. Red Hat OpenStack Platform 13, 16.2, and 17.1 ship RabbitMQ versions 3.6, 3.8, and 3.9 respectively, which do not contain the vulnerable code and are therefore not affected. Red Hat has classified this flaw as Low impact and affected products will not be fixed at this time.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.1 | N/A | N/A |
| Attack Vector | Network | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | Low | N/A | N/A |
| Availability Impact | None | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
A user can access restricted functionality and/or sensitive information that may include administrative functionality and user accounts.
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