| Name | CVE-2026-40204 |
| Description | None None None No publicly available exploits are known. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6526-1 |
| Debian Bugs | 1146018 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| dovecot (PTS) | bookworm, bookworm (security) | 1:2.3.19.1+dfsg1-2.1+deb12u6 | vulnerable |
| trixie | 1:2.4.1+dfsg1-6+deb13u6 | vulnerable |
| trixie (security) | 1:2.4.1+dfsg1-6+deb13u7 | fixed |
| forky | 1:2.4.5+dfsg1-2 | fixed |
| sid | 1:2.4.5+dfsg1-3 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://documentation.open-xchange.com/dovecot/security/advisories/html/2026/oxdc-adv-2026-0003.html#cve-2026-40204-acl-lda-mailbox-autocreate-can-bypass-acl-restrictions
Fixed by: https://github.com/dovecot/core/commit/7f2fbf017c479af0363aa35b2cd2dca4b92e16d2
Fixed by: https://github.com/dovecot/core/commit/fbf82497a2a7423825c5b6066559b8870ec9fa2a
Fixed by: https://github.com/dovecot/pigeonhole/commit/f0dfa83a01194126d9a7688bcf30e730d5873b63
Fixed by: https://github.com/dovecot/pigeonhole/commit/c211355da2ecdd2d858204468b12bd5667a44e30