What is CVE-2026-73646?
CVE-2026-73646 is a path traversal vulnerability in PostCSS's `lib/previous-map.js` where `loadMap()` passes attacker-controlled `sourceMappingURL` values unsafely. This allows unrestricted file read access via crafted input and affects versions prior to 8.5.18. Update to the patched version immediately.
Azərbaycanca: CVE-2026-73646 PostCSS-in `lib/previous-map.js` faylındakı `loadMap()` funksiyasında yol keçidi (path traversal) zəifliyidir. Təcavüzkar idarə etdiyi `sourceMappingURL` dəyəri vasitəsilə məhdudiyyətsiz fayl oxuya bilər. 8.5.18 versiyasına qədər təsir edir, yeniləmə tətbiq edilməlidir.
Related CVEs
link basis: same weakness class CWE-22
FAQ2
What versions of PostCSS are affected by CVE-2026-73646?
This path traversal vulnerability affects PostCSS versions prior to 8.5.18, and an update must be applied immediately.
How can an attacker exploit CVE-2026-73646?
An attacker can perform unrestricted file reads through the `loadMap()` function by supplying a manipulated `sourceMappingURL` value.
See also6
This explainer is AI-written from source data — skopnix's own reporting on this CVE; CVSS scores, vendors and versions are never invented. See NVD for the official record.