# CVE-2026-126777: Traccar authentication bypass in LDAP empty password handling

Source: https://junglewise.ai/threats/cve-2026-126777-traccar-3-15-before-6-17-0-contains-an-authentication-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-11. Updated: 2026-11-11  
License: CC BY 4.0 with a link back

CVE-2026-126777 · Severity: high · CVSS 7.4 · Published 2026-11-11

Traccar is a GPS tracking platform that uses LDAP for user authentication. When LDAP authentication is enabled, a vulnerability allows attackers to log in as any user, including administrators, by submitting an empty password if the LDAP directory permits unauthenticated binds. An attacker who knows a valid username can hijack accounts without knowing the password.

Technologies: [Traccar](https://junglewise.ai/threats/technologies/traccar). Vendors: [Traccar](https://junglewise.ai/threats/vendors/traccar).

## Quick answers

**Is CVE-2026-126777 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-126777 being exploited in the wild.

**How severe is CVE-2026-126777?** High severity, with a CVSS score of 7.4, published 11 November 2026.

**Which products and versions are affected?** Traccar 3.15 before 6.17.0.

**Is there a fix for CVE-2026-126777?** Yes: fixed in 6.17.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-126777 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-126777?** Check whether you run Traccar at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 6.17.0

## Technical details

The LdapProvider.login() method fails to reject empty passwords before performing LDAP bind operations. When a blank password is provided, the LDAP client performs an unauthenticated bind, which many LDAP servers permit by default. This allows any user with a known username to bypass authentication by sending POST requests to /api/session or using HTTP Basic authentication with an empty password, gaining full session access including admin privileges.

## Affected products

- Traccar Traccar 3.15 before 6.17.0

## Timeline

- 2026-11-11: disclosed

## References

- [https://github.com/traccar/traccar/blob/v3.15/src/org/traccar/database/LdapProvider.java](https://github.com/traccar/traccar/blob/v3.15/src/org/traccar/database/LdapProvider.java)
- [https://github.com/traccar/traccar/blob/v6.16.0/src/main/java/org/traccar/database/LdapProvider.java](https://github.com/traccar/traccar/blob/v6.16.0/src/main/java/org/traccar/database/LdapProvider.java)

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- [Traccar password recovery token misuse vulnerability](https://junglewise.ai/threats/cve-2026-108737-traccar-through-6-16-0-contains-a-weak-password-recovery)
- [Traccar group hierarchy cycle denial of service](https://junglewise.ai/threats/cve-2026-52852-traccar-group-hierarchy-cycle-denial-of-service)
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