CVE-2026-43964 PUBLISHED

Assigner: mitre
Reserved: 04.05.2026 Published: 04.05.2026 Updated: 04.05.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS Score: 3.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	Postfix
Product	Postfix
Versions	Default: unaffected affected from 2.3 to 3.8.16 (excl.) affected from 3.9 to 3.9.10 (excl.) affected from 3.10 to 3.10.9 (excl.)

References

https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html

Problem Types

CWE-193 Off-by-one Error CWE