Arbitrary Argument Injection Affecting dovecot-mysql package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.27% (19th percentile)

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  • Snyk IDSNYK-RHEL8-DOVECOTMYSQL-16759945
  • published19 May 2026
  • disclosed12 May 2026

Introduced: 12 May 2026

CVE-2026-40020  (opens in a new tab)
CWE-88  (opens in a new tab)

How to fix?

There is no fixed version for RHEL: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 RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is gained. Install to fixed version. No publicly available exploits are known.

CVSS Base Scores

version 3.1