CVE-2026-56858 Affecting aactl package, versions <0.4.12-r68


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.31% (24th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-AACTL-18787227
  • published14 Aug 2026
  • disclosed13 Aug 2026

Introduced: 13 Aug 2026

CVE-2026-56858  (opens in a new tab)

How to fix?

Upgrade Chainguard aactl to version 0.4.12-r68 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream aactl package and not the aactl package as distributed by Chainguard. See How to fix? for Chainguard 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