{"apiVersion":"1.0","identifier":"CVE-2026-73646","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.","publishedAt":"2026-08-17T16:17:47","lastModifiedAt":"2026-08-17T17:16:51","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73646","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","epssProbability":0.00377,"riskScore":0.78,"affectedProduct":"PostCSS","affectedVersions":"<8.5.18","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-73646","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-73646","en":"https://www.redsauce.net/en/cves/CVE-2026-73646","fr":"https://www.redsauce.net/fr/cves/CVE-2026-73646","pt":"https://www.redsauce.net/pt/cves/CVE-2026-73646","de":"https://www.redsauce.net/de/cves/CVE-2026-73646","sk":"https://www.redsauce.net/sk/cves/CVE-2026-73646","el":"https://www.redsauce.net/el/cves/CVE-2026-73646"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-73646"}}