Improper Verification of Source of a Communication Channel Affecting php:7.4/libzip package, versions <0:1.6.1-1.module+el8.10.0+22485+a3539972


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.56% (45th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL8-PHP-20162106
  • 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?

Upgrade RHEL:8 php:7.4/libzip to version 0:1.6.1-1.module+el8.10.0+22485+a3539972 or higher.
This issue was patched in RHSA-2026:87080.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php:7.4/libzip package and not the php:7.4/libzip package as distributed by RHEL. See How to fix? for RHEL:8 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