CVE-2026-44742
Postorius HTML Injection
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.
INFO
Published Date :
May 7, 2026, 7:16 p.m.
Last Modified :
May 26, 2026, 12:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Postorius to version 1.3.14 or later.
- Verify that message subjects are properly escaped.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44742.
| URL | Resource |
|---|---|
| https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b | Patch |
| https://gitlab.com/mailman/postorius/-/issues/620 | Issue Tracking Vendor Advisory |
| https://gitlab.com/mailman/postorius/-/merge_requests/972 | Issue Tracking Patch |
| https://www.openwall.com/lists/oss-security/2026/05/07/3 | Mailing List Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2026/05/msg00045.html |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44742 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44742
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44742 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44742 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 26, 2026
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2026/05/msg00045.html -
Initial Analysis by [email protected]
May. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:postorius_project:postorius:*:*:*:*:*:*:*:* versions up to (including) 1.3.13 Added Reference Type MITRE: https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b Types: Patch Added Reference Type MITRE: https://gitlab.com/mailman/postorius/-/issues/620 Types: Issue Tracking, Vendor Advisory Added Reference Type MITRE: https://gitlab.com/mailman/postorius/-/merge_requests/972 Types: Issue Tracking, Patch Added Reference Type MITRE: https://www.openwall.com/lists/oss-security/2026/05/07/3 Types: Mailing List, Patch, Third Party Advisory -
New CVE Received by [email protected]
May. 07, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b Added Reference https://gitlab.com/mailman/postorius/-/issues/620 Added Reference https://gitlab.com/mailman/postorius/-/merge_requests/972 Added Reference https://www.openwall.com/lists/oss-security/2026/05/07/3