CVE-2026-44742
CVE-2026-44742 is a high-severity vulnerability in Postorius Project Postorius with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: High (CVSS 3.x base score 7.2)
- EPSS exploit prediction: 0% (15th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-28415
- Weakness: CWE-79
- Affected product: Postorius Project Postorius
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2026-44742?
- CVE-2026-44742 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2026-44742 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-44742?
- CVE-2026-44742 affects Postorius Project Postorius. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-44742?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-44742 have an EU (EUVD) identifier?
- Yes. CVE-2026-44742 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28415.
- When was CVE-2026-44742 published?
- CVE-2026-44742 was published on 2026-05-07 and last updated on 2026-06-17.
References
- https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b
- https://gitlab.com/mailman/postorius/-/issues/620
- https://gitlab.com/mailman/postorius/-/merge_requests/972
- https://www.openwall.com/lists/oss-security/2026/05/07/3
- https://lists.debian.org/debian-lts-announce/2026/05/msg00045.html
Affected products (1)
- cpe:2.3:a:postorius_project:postorius:*:*:*:*:*:*:*:*
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