Vulnerability record
CVE-2026-126777
The short answer
CVE-2026-126777 affects Traccar Traccar and is rated critical (CVSS 9.1). It is not in CISA's Known Exploited Vulnerabilities catalog.
What it is
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.
Weakness: CWE-287.
Severity
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
No score
FIRST scores CVEs within a day of publication
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- Present
- Privileges required
- None
- User interaction
- None
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
Affected products
Traccar. NVD's record lists the exact affected versions.
References
- github.com/traccar/traccar/blob/v3.15/src/org/traccar/database/LdapProvider.java#L163-L169
- github.com/traccar/traccar/blob/v6.16.0/src/main/java/org/traccar/database/LdapProvider.java#L171-L176
- github.com/traccar/traccar/commit/552c31f2097dbed9edef7cfe174c50b16febdc21
- github.com/traccar/traccar/releases/tag/v6.17.0
- www.vulncheck.com/advisories/traccar-3.15-before-6.17.0-authentication-bypass-via-empty-ldap-password
Questions
Is CVE-2026-126777 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-12.
How do I fix CVE-2026-126777?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Deferred. The description is NVD's text, quoted as published.
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