CVE-2026-41076
RT: LDAP authentication bypass via empty password
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
RT: LDAP authentication bypass via empty password
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.
- Record
CVE-2026-41076- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
EUVDEUVD-2026-31504
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.
- Record
EUVD-2026-31504- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-41076- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
RT: LDAP authentication bypass via empty password
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.
- Record
CVE-2026-41076- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2026-41076- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2026-41076- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
request-tracker4Debian:12 |
before 4.4.6+dfsg-1.1+deb12u4, plus listed versions 4.4.6+dfsg-1.14.4.6+dfsg-1.1+deb12u14.4.6+dfsg-1.1+deb12u24.4.6+dfsg-1.1+deb12u3 |
4.4.6+dfsg-1.1+deb12u4 |
request-tracker5Debian:12 |
before 5.0.3+dfsg-3~deb12u6, plus listed versions 5.0.3+dfsg-25.0.3+dfsg-3~deb12u15.0.3+dfsg-3~deb12u25.0.3+dfsg-3~deb12u35.0.3+dfsg-3~deb12u45.0.3+dfsg-3~deb12u5 |
5.0.3+dfsg-3~deb12u6 |
request-tracker5Debian:13 |
before 5.0.7+dfsg-4+deb13u3, plus listed versions 5.0.7+dfsg-45.0.7+dfsg-4+deb13u15.0.7+dfsg-4+deb13u2 |
5.0.7+dfsg-4+deb13u3 |
request-tracker5Debian:14 |
before 5.0.10+dfsg-1, plus listed versions 5.0.7+dfsg-45.0.7+dfsg-55.0.7+dfsg-65.0.9+dfsg-15.0.9+dfsg-25.0.9+dfsg-35.0.9+dfsg-4 |
5.0.10+dfsg-1 |
request-tracker4Ubuntu:16.04:LTS |
All versions, plus listed versions 4.2.11-24.2.12-34.2.12-44.2.12-5 |
None known |
request-tracker4Ubuntu:Pro:18.04:LTS |
All versions, plus listed versions 4.4.1-54.4.2-14.4.2-24.4.2-2ubuntu0.1~esm1 |
None known |
request-tracker4Ubuntu:20.04:LTS |
All versions, plus listed versions 4.4.3-24.4.3-2+deb10u3build0.20.04.1 |
None known |
request-tracker4Ubuntu:22.04:LTS |
All versions, plus listed versions 4.4.4+dfsg-2ubuntu14.4.4+dfsg-2ubuntu1.22.04.1 |
None known |
request-tracker5Ubuntu:Pro:22.04:LTS |
before 5.0.1+dfsg-1ubuntu1+esm2, plus listed versions 5.0.1+dfsg-1ubuntu15.0.1+dfsg-1ubuntu1+esm1 |
5.0.1+dfsg-1ubuntu1+esm2 |
request-tracker4Ubuntu:24.04:LTS |
All versions, plus listed versions 4.4.4+dfsg-2ubuntu14.4.4+dfsg-2ubuntu24.4.7+dfsg-1 |
None known |
Show 5 moreShow less
| Package | Affected | Fixed |
|---|---|---|
request-tracker5Ubuntu:Pro:24.04:LTS |
before 5.0.5+dfsg-2ubuntu0.1~esm2, plus listed versions 5.0.1+dfsg-1ubuntu15.0.5+dfsg-25.0.5+dfsg-2ubuntu0.1~esm1 |
5.0.5+dfsg-2ubuntu0.1~esm2 |
request-tracker4Ubuntu:25.10 |
All versions, plus listed versions 4.4.7+dfsg-4syncable1 |
None known |
request-tracker5Ubuntu:25.10 |
All versions, plus listed versions 5.0.7+dfsg-25.0.7+dfsg-35.0.7+dfsg-4 |
None known |
request-tracker4Ubuntu:26.04:LTS |
All versions, plus listed versions 4.4.7+dfsg-4syncable1 |
None known |
request-tracker5Ubuntu:Pro:26.04:LTS |
before 5.0.7+dfsg-6ubuntu0.1~esm1, plus listed versions 5.0.7+dfsg-45.0.7+dfsg-6 |
5.0.7+dfsg-6ubuntu0.1~esm1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-41076 is a high vulnerability (CVSS 8.1) in Bestpractical Rt, published May 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. Fixed in request-tracker4 4.4.6+dfsg-1.1+deb12u4.
References
github.com/bestpractical/rt/security/advisories/GHSA-3w28-fmcr-mjjx
nvd.nist.gov/vuln/detail/CVE-2026-41076
security-tracker.debian.org/tracker/CVE-2026-41076
ubuntu.com/security/CVE-2026-41076
cve.org/CVERecord?id=CVE-2026-41076