Directory Traversal Affecting unleash package, versions <8.0.3-r3


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.38% (31st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-UNLEASH-18810029
  • published15 Aug 2026
  • disclosed17 Aug 2026

Introduced: 15 Aug 2026

CVE-2026-73646  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

Upgrade Chainguard unleash to version 8.0.3-r3 or higher.

NVD Description

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

PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.18, lib/previous-map.js loadMap() passes attacker-controlled sourceMappingURL values to join(dirname(opts.from), annotation), and loadFile() permits traversed or absolute .map paths, allowing untrusted CSS processed without map: false to disclose sourcesContent from arbitrary reachable .map files through result.map. This issue is fixed in version 8.5.18.

CVSS Base Scores

version 3.1