{"id":"CVE-2026-44742","aliases":["GHSA-r7c9-7pjq-hmm8","PYSEC-2026-2891"],"url":"https://o3.security/vulnerability/CVE-2026-44742","summary":"Postorius is vulnerable to XSS","details":"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.","published":"2026-05-07T18:09:20.069Z","modified":"2026-08-19T18:52:13.121219957Z","cvss":{"score":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"},"epss":{"score":0.00237,"percentile":0.14468,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"postorius","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2026/05/msg00045.html"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/05/07/3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44742.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44742"},{"type":"REPORT","url":"https://gitlab.com/mailman/postorius/-/issues/620"},{"type":"FIX","url":"https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b"},{"type":"FIX","url":"https://gitlab.com/mailman/postorius/-/merge_requests/972"},{"type":"PACKAGE","url":"https://gitlab.com/mailman/postorius"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-19T18:52:13.121219957Z"}}