CVE-2026-126777
Traccar 3.15 before 6.17.0 Authentication Bypass via Empty LDAP Password
Traccar 3.15 before 6.17.0 contains an authentication bypass vulnerability in LdapProvider.login() that fails to reject empty passwords, causing LDAP binds to be performed as unauthenticated binds when LDAP authentication is enabled. Unauthenticated attackers who know a valid username can log in via POST /api/session or HTTP Basic authentication with an empty password against directories that permit unauthenticated binds, obtaining sessions for any account including administrators.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Traccar Traccar traccar/traccar
github |
≥ 3.15; < 6.17.0 (affected, custom) 6.17.0 (unaffected, custom) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 9.1 critical |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 7.4 high |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/traccar/traccar/commit/552c31f2097dbed9edef7cfe174c50b16febdc21CNA: VulnCheck · patch
- https://github.com/traccar/traccar/releases/tag/v6.17.0CNA: VulnCheck · release-notes
- https://github.com/traccar/traccar/blob/v6.16.0/src/main/java/org/traccar/database/LdapProvider.java#L171-L176CNA: VulnCheck · technical-description
- https://github.com/traccar/traccar/blob/v3.15/src/org/traccar/database/LdapProvider.java#L163-L169CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/traccar-3.15-before-6.17.0-authentication-bypass-via-empty-ldap-passwordCNA: VulnCheck · third-party-advisory
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