Incorrect Implementation of Authentication Algorithm Affecting dovecot-mysql package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-CENTOS8-DOVECOTMYSQL-19733213
  • published13 Sept 2026
  • disclosed28 Aug 2026

Introduced: 28 Aug 2026

CVE-2026-40205  (opens in a new tab)
CWE-303  (opens in a new tab)

How to fix?

There is no fixed version for Centos:8 dovecot-mysql.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dovecot-mysql package and not the dovecot-mysql package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

An attacker that holds an OAuth2 token granting only part of the required scopes can authenticate, because when more than one scope is required in the configuration, the remote token validation paths accept a token that carries only one of them, while the local token validation path correctly requires all of them. The configured authorization policy is not enforced, so a token that was granted only part of the required permissions is accepted where it should have been rejected. Use local token validation where tokens can be validated locally. Update to non-vulnerable version. No publicly available exploits are known.

CVSS Base Scores

version 3.1