---
cve: "CVE-2026-69153"
severity: "MEDIUM"
cvss: 6.3
epss: "0.5%"
vendor: "postcss"
kev: false
exploited: false
published: "2026-08-03 16:56:25"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-05T03:13:04+02:00"
---

# CVE-2026-69153

> 6.3 MEDIUM · 🧪 PoC

## Beschreibung

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 8.5.19, if from is unset, an attacker can cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL. The resulting map’s sources and sourcesContent may then be exposed to the application. This issue is fixed in version 8.5.19.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 7beca139e70f9075c6b19700fcb00dd8033e5da8 (Commit)
- 9543b22769bef5bcd47600fbca752204c106cda8 (Commit)

## Referenzen

- <https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp>
- <https://github.com/postcss/postcss/commit/7beca139e70f9075c6b19700fcb00dd8033e5da8>
- <https://github.com/postcss/postcss/releases/tag/8.5.19>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-69153) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_