CVE-2026-91768 Affecting php-xmlrpc package, versions <0:7.4.33-8.module+el8.10.0+40393+c071e357


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.38% (32nd percentile)

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  • Snyk IDSNYK-ROCKY8-PHPXMLRPC-21442334
  • published23 Oct 2026
  • disclosed25 Sept 2026

Introduced: 25 Sep 2026

CVE-2026-91768  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 php-xmlrpc to version 0:7.4.33-8.module+el8.10.0+40393+c071e357 or higher.
This issue was patched in RLSA-2026:87080.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php-xmlrpc package and not the php-xmlrpc package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux: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