---
id: CVE-2026-108738
title: >-
  Traccar 5.7 through 6.16.0 contains a cross-site request forgery vulnerability
  that allows attackers to log victims into attacker-controlled accounts because
  the OpenID Connect callback never validates the OAuth state parameter
summary: >-
  Traccar 5.7 through 6.16.0 contains a cross-site request forgery vulnerability
  that allows attackers to log victims into attacker-controlled accounts because
  the OpenID Connect callback never validates the OAuth state parameter.
  Attacker…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-352
published: '2026-10-11'
updated: '2026-10-11'
sourceUpdated: '2026-10-11T13:17:18.337'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108738'
references:
  - url: 'https://github.com/traccar/traccar'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/traccar/traccar/blob/cfab560c79ee9c9eaa41c79c6df351e820d6284b/src/main/java/org/traccar/api/resource/SessionResource.java#L175-L193
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/traccar/traccar/blob/cfab560c79ee9c9eaa41c79c6df351e820d6284b/src/main/java/org/traccar/database/OpenIdProvider.java#L110-L198
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind/traccar-oidc-client-missing-state-login-csrf'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/traccar-5.7-through-6.16.0-login-csrf-via-openid-connect-callback
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-11T13:51:17.034Z'
---

## Overview

Traccar 5.7 through 6.16.0 contains a cross-site request forgery vulnerability that allows attackers to log victims into attacker-controlled accounts because the OpenID Connect callback never validates the OAuth state parameter. Attackers can induce a victim's browser to load /api/session/openid/callback with their own authorization code, causing data the victim enters, such as registered devices, to land in the attacker's account.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.