CVE-2026-43964
7.5
HIGH
CVSS 3.1
EPSS 0.07%
Description
Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and process crash via an enhanced status code that lacks text after the third number.
How to fix CVE-2026-43964
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/postfix—no fix listed
Is CVE-2026-43964 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |