# CVE-2023-44270: node-postcss: An issue was discovered in PostCSS before 8.4.31

CVE-2023-44270 is fixed in node-postcss on 1 platform, first by DEBIAN-CVE-2023-44270, released September 29, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-44270
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0097
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 29, 2023

## Description

An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contains parts parsed by PostCSS as a CSS comment. After processing by PostCSS, it will be included in the PostCSS output in CSS nodes (rules, properties) despite being included in a comment.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-postcss Debian 12.15 (bookworm) | 8.4.20+~cs8.0.23-1+deb12u1 | [DEBIAN-CVE-2023-44270](https://patchblox.com/security/data/fix/linux/debian-cve-2023-44270.md) | Sep 29, 2023 |
| Linux | node-postcss Debian 13.5 (trixie) | 8.4.31+~cs8.0.26-1 | [DEBIAN-CVE-2023-44270](https://patchblox.com/security/data/fix/linux/debian-cve-2023-44270.md) | Sep 29, 2023 |
| Linux | node-postcss Debian 14 | 8.4.31+~cs8.0.26-1 | [DEBIAN-CVE-2023-44270](https://patchblox.com/security/data/fix/linux/debian-cve-2023-44270.md) | Sep 29, 2023 |

---

Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.