VulnerabilityModified
CVE-2026-44742
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.
MEDIUM 6.1EPSS 0.24%
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- postorius project/postorius
- Source
- cve@mitre.org
References
- https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868bPatch
- https://gitlab.com/mailman/postorius/-/issues/620Issue Tracking, Vendor Advisory
- https://gitlab.com/mailman/postorius/-/merge_requests/972Issue Tracking, Patch
- https://www.openwall.com/lists/oss-security/2026/05/07/3Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2026/05/msg00045.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.