Improper Verification of Source of a Communication Channel Affecting php-fpm package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.56% (45th percentile)

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  • Snyk IDSNYK-RHEL7-PHPFPM-20170814
  • published27 Sept 2026
  • disclosed25 Sept 2026

Introduced: 25 Sep 2026

NewCVE-2026-91768  (opens in a new tab)
CWE-940  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 php-fpm.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php-fpm package and not the php-fpm package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

The IPv6 branch of the FastCGI client access check compares only the first 12 bytes of a 16-byte IPv6 address, so listen.allowed_clients matches on a /96 prefix instead of the exact address. An attacker who can source an address sharing the first 96 bits with an allowed one passes the check and reaches the FastCGI endpoint.

CVSS Base Scores

version 3.1