Improper Certificate Validation Affecting apcu-panel package, versions <0:5.1.18-1.module+el8.10.0+22485+a3539972


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.14% (3rd percentile)

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  • Snyk IDSNYK-CENTOS8-APCUPANEL-20424360
  • published4 Oct 2026
  • disclosed25 Sept 2026

Introduced: 25 Sep 2026

NewCVE-2026-91769  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Centos:8 apcu-panel to version 0:5.1.18-1.module+el8.10.0+22485+a3539972 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apcu-panel package and not the apcu-panel package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN was still accepted when its CN matched the requested peer_name. A certificate trusted by the client for one name can therefore be used to impersonate another.

CVSS Base Scores

version 3.1