Cross-site Scripting (XSS) Affecting runc package, versions <4:1.2.9-6.module+el8.10.0+24790+ef71b018


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.31% (24th percentile)

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  • Snyk IDSNYK-CENTOS8-RUNC-19742078
  • published13 Sept 2026
  • disclosed13 Aug 2026

Introduced: 13 Aug 2026

CVE-2026-56858  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Centos:8 runc to version 4:1.2.9-6.module+el8.10.0+24790+ef71b018 or higher.

NVD Description

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

Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.

CVSS Base Scores

version 3.1