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CVE-2026-44742 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:7.2 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://lists.debian.org/debian-lts-announce/2026/05/msg00045.html	CVE
https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b	[email protected]	Patch
https://gitlab.com/mailman/postorius/-/issues/620	[email protected]	Issue TrackingVendor Advisory
https://gitlab.com/mailman/postorius/-/merge_requests/972	[email protected]	Issue TrackingPatch
https://www.openwall.com/lists/oss-security/2026/05/07/3	[email protected]	Mailing ListPatchThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
postorius project postorius	<= 1.3.13
CPE cpe:2.3:a:postorius_project:postorius:::::::: Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
May 26, 2026	CVE Modified	CVE
May 14, 2026	Initial Analysis	[email protected]
May 7, 2026	New CVE Received	[email protected]