CVE-2026-43964

CVSS 3.7 LOWEPSS 0.3%CWE-193

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 3.7EPSS 0.3%KEV nãoPoC —Patch —

Lifecycle

04 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

Postfix · Postfix

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html http://www.openwall.com/lists/oss-security/2026/05/04/30