CVE-2026-73646

7.5 Élevée

Publiée le 17/08/2026 à 18:17 · Modifiée le 18/09/2026 à 22:05 · En attente d'analyse NVD · Source : security-advisories@github.com

Description

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.

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Produits concernés

postcss

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.5 Élevée	security-advisories@github.com	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`

Faiblesses (CWE)

CWE-22

Références

https://github.com/postcss/postcss/commit/95663d3eb7ba26f4854dd19d3b4f4425760cf56c
https://github.com/postcss/postcss/releases/tag/8.5.18
https://github.com/postcss/postcss/security/advisories/GHSA-r28c-9q8g-f849
https://github.com/postcss/postcss/security/advisories/GHSA-r28c-9q8g-f849

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories