P4Verified

CVE-2023-51764: postfix before 3.5.23 (exclusive), from 3.6.0 (inclusive), before 3.6.13 (exclusive), from 3.7.0 (inclusive), before…

CVE-2023-51764. CVSS 3.1 base score 5.3 (MEDIUM, NVD). EPSS 0.02635 (percentile 0.85102), scored 2026-10-08.

Affected technology

postfix · before 3.5.23 (exclusive)
postfix

postfix · from 3.6.0 (inclusive), before 3.6.13 (exclusive)
postfix

postfix · from 3.7.0 (inclusive), before 3.7.9 (exclusive)
postfix

postfix · from 3.8.0 (inclusive), before 3.8.4 (exclusive)
postfix

fedora · 38
fedoraproject

fedora · 39
fedoraproject

enterprise linux · 8.0
redhat

enterprise linux · 9.0
redhat

n/a · n/a
Vendor not specified by the source

Description’s affected range: through 3.8.5

Component: Not specified by the source

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. NVD’s CVSS 3.1 assessment (base score 5.3/10) rates confidentiality and availability impact as none; integrity impact as low.

Published 2026-10-09 03:15:33.671411+00:00

CWE: CWE-345
CCR priority: 21.9 /100 (P4)
CVSS 3.1: 5.3 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N · NVD
EPSS: 0.02635 · percentile 0.85102 · 2026-10-08
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-09 03:13:32.966430+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2023-51764.html