PT-2026-42845 · Best Practical · Rt

Published 2026-05-22 · Updated 2026-05-22 · CVE-2026-41076

Mitre

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

RT is an open source, enterprise-grade issue and ticket tracking system. Versions 5.0.9 and prior in addition to 6.0.0 through 6.0.2 contain an authentication bypass vulnerability in RT installations that use LDAP/AD for user authentication. Under certain LDAP server configurations, an attacker may be able to authenticate as any LDAP-backed RT user without supplying valid credentials. This issue has been fixed in versions 5.0.10 and 6.0.3. If developers are unable to upgrade immediately, they can temporarily work around this issue by reviewing their LDAP server's authentication policy to ensure it rejects unauthenticated bind attempts. Upgrading RT remains the recommended fix.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2026-41076

Affected Products

Rt

References · 3

• https://github.com/bestpractical/rt/releases/tag/rt-6.0.3 · Note
• https://github.com/bestpractical/rt/releases/tag/rt-5.0.10 · Note
• https://github.com/bestpractical/rt/security/advisories/GHSA-3w28-fmcr-mjjx · Note