What is the CVSS score of CVE-2026-41076?

CVE-2026-41076 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Request Tracker are affected by CVE-2026-41076?

Request Tracker (RT) versions 5.0.9 and earlier, and 6.0.0 through 6.0.2 contain an authentication bypass vulnerability that allows unauthorized login as any LDAP-backed user without valid…. A patch is available.

How to fix or mitigate CVE-2026-41076?

24 hours: Conduct inventory of all RT deployments and identify which instances have LDAP or Active Directory authentication enabled. 7 days: Deploy patches immediately-upgrade to RT 5.0.10 (legacy versions) or RT 6.0.3 (current versions), both released 2026-05-20. 30 days: Verify patch deployment across all systems, audit LDAP server configurations to reject unauthenticated bind requests, and review authentication logs for signs of unauthorized access exploitation.

Request Tracker CVE-2026-41076

HIGH

Improper Authentication (CWE-287)

2026-05-22 GitHub_M

Authentication Bypass Rt

8.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.1 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Source Code Evidence Fetched

May 22, 2026 - 22:15 vuln.today

Analysis Generated

May 22, 2026 - 22:15 vuln.today

DescriptionGitHub Advisory

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.

AnalysisAI

Authentication bypass in Best Practical's Request Tracker (RT) versions 5.0.9 and prior, and 6.0.0 through 6.0.2, allows remote attackers to log in as any LDAP-backed user without valid credentials when RT is configured with LDAP or Active Directory authentication and the LDAP server accepts unauthenticated bind requests. The flaw, fixed in RT 5.0.10 and 6.0.3 released 2026-05-20, carries a CVSS 8.1 and has no public exploit identified at time of analysis, but the trivial nature of the bypass against vulnerable LDAP policies makes it high-priority for any RT deployment using directory-based auth.

Technical ContextAI

Request Tracker is a widely deployed Perl-based enterprise ticketing system from Best Practical Solutions, often integrated with corporate directories via its LDAP/Active Directory authentication module. The root cause is classified as CWE-287 (Improper Authentication): RT's LDAP bind logic does not adequately reject credential submissions that the LDAP server may interpret as anonymous or unauthenticated binds. In LDAP, an empty password or certain malformed credentials can result in the directory server returning a success response (anonymous bind) rather than an authentication failure, which RT then misinterprets as proof of identity for the supplied username. The CPE cpe:2.3:a:bestpractical:rt:*:*:*:*:*:*:*:* confirms all RT product variants within the affected ranges are in scope when the LDAP auth backend is in use.

RemediationAI

Vendor-released patch: upgrade to RT 5.0.10 (https://github.com/bestpractical/rt/releases/tag/rt-5.0.10) on the 5.0.x branch or RT 6.0.3 (https://github.com/bestpractical/rt/releases/tag/rt-6.0.3) on the 6.0.x branch, both released 2026-05-20 and signed tarballs available at download.bestpractical.com; the GHSA advisory is at https://github.com/bestpractical/rt/security/advisories/GHSA-3w28-fmcr-mjjx. If upgrade is not immediately possible, the vendor-recommended workaround is to reconfigure the upstream LDAP/AD server to reject unauthenticated bind attempts (e.g., set olcDisallows: bind_anon on OpenLDAP, or ensure Active Directory's LDAPServerIntegrity and 'ldapenforcechannelbinding' policies disallow anonymous binds with a non-empty DN); note that tightening LDAP policy may break legitimate applications that rely on anonymous searches, so test in a staging environment first. As a further compensating control, restrict network access to RT's login endpoint to trusted VPN ranges and monitor authentication logs for successful logins lacking corresponding LDAP bind events. Upgrading RT remains the only complete fix.