Auth bypass in Bestpractical Rt
CVE-2026-41076
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.
Vulnerability class: Broken Authentication
EPSS: 0.004 (32.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Bestpractical Rt — versions < 5.0.10, >= 6.0.0, < 6.0.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-41076?
- CVE-2026-41076 is a high-severity vulnerability in Bestpractical Rt, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-05-22.
- How severe is CVE-2026-41076?
- High severity. CVSS v3 base score is 8.1 out of 10.