{
"id": "GHSA-r7c9-7pjq-hmm8",
"aliases": [
"CVE-2026-44742"
],
"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.",
"summary": "Postorius is vulnerable to XSS",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.3.13"
}
]
}
],
"package": {
"name": "postorius",
"ecosystem": "PyPI"
}
}
],
"modified": "2026-05-12T16:20:35Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
}
],
"published": "2026-05-07T21:30:29Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44742",
"type": "ADVISORY"
},
{
"url": "https://gitlab.com/mailman/postorius",
"type": "PACKAGE"
},
{
"url": "https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b",
"type": "WEB"
},
{
"url": "https://gitlab.com/mailman/postorius/-/issues/620",
"type": "WEB"
},
{
"url": "https://gitlab.com/mailman/postorius/-/merge_requests/972",
"type": "WEB"
},
{
"url": "https://www.openwall.com/lists/oss-security/2026/05/07/3",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-05-07T19:16:02Z",
"github_reviewed_at": "2026-05-12T16:20:35Z"
}
}