Vulnerability record · CVE-2026-41076 · published 22 May 2026

CVE-2026-41076: Improper authentication vulnerability

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.

8.1 CVSS 3.1 High EPSS 0.66% · top 50.5% CWE-287 · Improper authentication Deferred

8.1CVSS 3.1 base score

0.66%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

3References

23 Jul 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-41076), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.