CVE-2026-43964

LOW

Postfix < 3.8.16, 3.9 < 3.9.10, 3.10 < 3.10.9 - Denial of Service via Enhanced Status Code Parsing

Title source: llm
STIX 2.1

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.

References (8)

Core 8

Scores

CVSS v3 3.7
EPSS 0.0042
EPSS Percentile 34.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-193
Status published
Products (4)
postfix/postfix < 3.8.16
Postfix/Postfix 2.3 - 3.8.16
Postfix/Postfix 3.10 - 3.10.9
Postfix/Postfix 3.9 - 3.9.10
Published May 04, 2026
Tracked Since May 05, 2026