SB2026080126 - Improper Authorization in Doorkeeper

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Main Vulnerability Database SB2026080126

SB2026080126 - Improper Authorization in Doorkeeper

Published: August 1, 2026

Security Bulletin ID SB2026080126
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Authorization (CVE-ID: N/A)

CWE-ID: CWE-285 - Improper Authorization

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to revoke tokens without correct authorization.

The vulnerability exists due to improper authorization in the OAuth token revocation endpoint when handling token revocation requests for public (non-confidential) clients. A remote attacker can send a crafted token revocation request to revoke tokens without correct authorization.

Only deployments using public (non-confidential) clients in the OAuth token revocation flow are vulnerable.


Remediation

Install update from vendor's website.

References