CVE catalog
CVE-2026-73646
node-postcss: CVE-2026-73646
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.53% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | node-postcss | sid | 8.5.31+~cs10.2.26-1 | fixed |
| Debian | node-postcss | forky | 8.5.31+~cs10.2.26-1 | fixed |
| Debian | node-postcss | trixie | 8.4.49+~cs9.2.32-1 | vulnerable |
| Debian | node-postcss | bookworm | 8.4.20+~cs8.0.23-1+deb12u1 | vulnerable |
| Npm | postcss | Not reported | 8.5.18 | fixed |
| Ubuntu | node-postcss | 20.04 | 6.0.23-1 | vulnerable |
| Ubuntu | node-postcss | 20.04 | 6.0.23-3 | vulnerable |
| Ubuntu | node-postcss | 22.04 | 8.2.1+~cs5.3.23-8 | vulnerable |
| Ubuntu | node-postcss | 22.04 | 8.4.5+~cs7.1.51-2 | vulnerable |
| Ubuntu | node-postcss | 22.04 | 8.4.6+~cs7.3.21-1 | vulnerable |
| Ubuntu | node-postcss | 24.04 | 8.4.20+~cs8.0.23-1 | vulnerable |
| Ubuntu | node-postcss | 24.04 | 8.4.31+~cs8.0.26-1 | vulnerable |
| Ubuntu | node-postcss | 26.04 | 8.5.6+~cs9.3.28-1 | vulnerable |
| Ubuntu | node-postcss | 26.04 | 8.5.8+~cs9.3.30-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | node-postcss | source | sid | 8.5.19+~cs10.2.23-1 | not yet assigned | Not reported | Not reported |
| Debian | node-postcss | source | forky | 8.5.19+~cs10.2.23-1 | not yet assigned | Not reported | Not reported |
| Debian | node-postcss | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | node-postcss | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Npm | postcss | npm | Not reported | 8.5.18 | Not reported | GHSA-R28C-9Q8G-F849 | Not reported |
Notes
[trixie] node-postcss: Minor issue [bookworm] node-postcss: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [node-postcss]Affected
Details (2)
8.4.20+~cs8.0.23-1+deb12u1· all · bookwormAffected
dsa · node-postcss · debian · bookworm; dsa · node-postcss · debian · 12
8.4.20+~cs8.0.23-1+deb12u1· all · bookwormAffected
dsa · node-postcss · debian · bookworm; dsa · node-postcss · debian · 12
[Debian 13 (Trixie)]
- [node-postcss]Affected
Details (2)
8.4.49+~cs9.2.32-1· all · trixieAffected
dsa · node-postcss · debian · 13
8.4.49+~cs9.2.32-1· all · trixieAffected
dsa · node-postcss · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_12070-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-73646]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-73646]
- [https://osv.dev/vulnerability/GHSA-r28c-9q8g-f849]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-73646]
- [https://security-tracker.debian.org/tracker/CVE-2026-73646]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73646.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3376.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]