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Fencer Vulns
high 8.1

CVE-2026-41076 json

RT: LDAP authentication bypass via empty password

published 2026-05-22 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-31504

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

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.

Patch / fix

  • bestpractical request_tracker 5.0.10, 6.0.3
  • bestpractical rt 5.0.10, 6.0.3
  • request-tracker4 Debian 12 4.4.6+dfsg-1.1+deb12u4
  • request-tracker5 Debian 12 5.0.3+dfsg-3~deb12u6
  • request-tracker5 Debian 13 5.0.7+dfsg-4+deb13u3
  • request-tracker5 Debian 14 5.0.10+dfsg-1

debian advisories DEBIAN-CVE-2026-41076

  • request-tracker5 Ubuntu Pro 22.04 LTS 5.0.1+dfsg-1ubuntu1+esm2
  • request-tracker5 Ubuntu Pro 24.04 LTS 5.0.5+dfsg-2ubuntu0.1~esm2
  • request-tracker5 Ubuntu Pro 26.04 LTS 5.0.7+dfsg-6ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2026-41076

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41076 updated cvss 8.1

rt: RT: Authentication bypass allows unauthorized access via specific LDAP configurations

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • bestpractical rt

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.