Cross-site Scripting (XSS) Affecting apko package, versions <1.2.11-r2


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.31% (23rd percentile)

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  • Snyk IDSNYK-WOLFILATEST-APKO-16617528
  • published9 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-39823  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Wolfi apko to version 1.2.11-r2 or higher.

NVD Description

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

CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.

CVSS Base Scores

version 3.1