CVE-2026-40020
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.
- Dovecot
- < 2.4.4
- Open-xchange Dovecot
- < 3.1.5
- Fix
- Available
- CVSS 3.1
- 4.3 MEDIUM
- EPSS
- 0.3% (18th percentile)
- Weakness
- CWE-284
- NVD status
- Analyzed
- Published
- 2026-05-12
CVE-2026-40020 at NVD
No indexed exploits for CVE-2026-40020 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-40020 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.