Cross-site Scripting (XSS) Affecting runc package, versions <0:1.0.0-98.rhaos4.8.gitcd80260.el8


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.19% (64th percentile)

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  • Snyk IDSNYK-RHEL8-RUNC-18678819
  • published12 Aug 2026
  • disclosed13 Jan 2021

Introduced: 13 Jan 2021

CVE-2021-21610  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade RHEL:8 runc to version 0:1.0.0-98.rhaos4.8.gitcd80260.el8 or higher.
This issue was patched in RHSA-2021:2437.

NVD Description

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

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not implement any restrictions for the URL rendering a formatted preview of markup passed as a query parameter, resulting in a reflected cross-site scripting (XSS) vulnerability if the configured markup formatter does not prohibit unsafe elements (JavaScript) in markup.

CVSS Base Scores

version 3.1