| Name | CVE-2026-44742 |
| Description | Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026. |
| 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 | DLA-4600-1, DSA-6257-1 |
| Debian Bugs | 1136003 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| postorius (PTS) | bullseye | 1.3.4-2+deb11u1 | vulnerable |
| bullseye (security) | 1.3.4-2+deb11u2 | fixed |
| bookworm, bookworm (security) | 1.3.8-3+deb12u1 | fixed |
| trixie (security), trixie | 1.3.13-1+deb13u1 | fixed |
| forky, sid | 1.3.13-1+deb13u1 | vulnerable |
The information below is based on the following data on fixed versions.
Notes
https://gitlab.com/mailman/postorius/-/commit/8d00a3c317729f37435bdbd27170f630e341f29e
https://gitlab.com/mailman/postorius/-/merge_requests/972