---
cve: "CVE-2026-90774"
severity: "HIGH"
cvss: 8.7
epss: "0.4%"
vendor: "orhun"
kev: false
exploited: false
published: "2026-09-13 11:17:02"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T18:29:15+02:00"
---

# CVE-2026-90774

> 8.7 HIGH · 🧪 PoC

## Beschreibung

rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/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)

- 71d0b5d001fb2ec041d95ca75b4eff18293e9f10 (Commit)
- ac05d552596af4a8429d80f30d11f67117ce02c8 (Commit)

## Referenzen

- <https://github.com/orhun/rustypaste/issues/622>
- <https://github.com/orhun/rustypaste>
- <https://github.com/orhun/rustypaste/blob/v0.18.0/src/paste.rs>
- <https://github.com/orhun/rustypaste/commit/ac05d552596af4a8429d80f30d11f67117ce02c8>
- <https://www.vulncheck.com/advisories/rustypaste-before-0.18.1-path-traversal-via-filename-header>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-90774) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_