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CVE-2026-126777 Traccar 3.15 before 6.17.0 Authentication Bypass via Empty LDAP Password

9.1 criticalEPSS 0.5%

Critical (9.1) in traccar traccar. EPSS 0.5% estimated probability of exploitation activity in the next 30 days.

On this page
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.

Severity

CVSS 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

CVSS 3.1

7.4 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
0.5% estimated probability of exploitation activity in the next 30 days; 41st percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-287 Improper Authentication
OWASP Top 10
A07:2025 Authentication Failures
Published
Modified
Assigned by
VulnCheck (CNA)
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
Traccarfrom 3.15 before 6.17.0

Attack patterns (CAPEC)

  • CAPEC-22 Exploiting Trust in Client Likelihood: High · Severity: High
  • CAPEC-57 Utilizing REST's Trust in the System Resource to Obtain Sensitive Data Likelihood: Medium · Severity: Very High
  • CAPEC-94 Adversary in the Middle (AiTM) Likelihood: High · Severity: Very High
  • CAPEC-114 Authentication Abuse Severity: Medium
  • CAPEC-115 Authentication Bypass Severity: Medium
  • CAPEC-151 Identity Spoofing Likelihood: Medium · Severity: Medium
  • CAPEC-194 Fake the Source of Data Severity: Medium
  • CAPEC-593 Session Hijacking Likelihood: High · Severity: Very High
  • CAPEC-633 Token Impersonation Severity: Medium
  • CAPEC-650 Upload a Web Shell to a Web Server Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

History

  1. The NVD deferred its analysis

Changes since this site first stored the record. The same for every record: /api/public/changes.

References

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