CVE-2026-43964: low-severity vulnerability in Postfix
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 3.7epss 0.5%
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 · PostfixReferences
https://access.redhat.com/errata/RHSA-2026:25930https://access.redhat.com/errata/RHSA-2026:25932https://access.redhat.com/errata/RHSA-2026:26205https://access.redhat.com/errata/RHSA-2026:50963https://access.redhat.com/errata/RHSA-2026:50964https://access.redhat.com/errata/RHSA-2026:51034https://access.redhat.com/errata/RHSA-2026:51436https://access.redhat.com/errata/RHSA-2026:57174https://access.redhat.com/security/cve/CVE-2026-43964https://bugzilla.redhat.com/show_bug.cgi?id=2466488https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43964.jsonhttps://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html