CVE-2026-44742
Postorius is vulnerable to XSS
7.2
HIGH
CVSS 3.1
EPSS 0.01%
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.
How to fix CVE-2026-44742
To remediate CVE-2026-44742, upgrade the affected package to a fixed version below.
- Debian/postorius—upgrade to 1.3.4-2+deb11u2 or later
- PyPI/postorius—no fix listed
Is CVE-2026-44742 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.3.4-2+deb11u2
- from 0, <= 1.3.13
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |