---
cve: "CVE-2026-55874"
severity: "HIGH"
cvss: 7.7
epss: "33%"
vendor: "seaweedfs"
kev: false
exploited: false
published: "2026-07-08 15:16:30"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T08:00:58+02:00"
---

# CVE-2026-55874

> 7.7 HIGH · 🧪 PoC

## Beschreibung

SeaweedFS is a distributed storage system. Prior to 4.34, the S3 API gateway does not reject dot-dot path segments in the X-Amz-Copy-Source header used by CopyObject and UploadPartCopy, allowing an authenticated identity scoped to one bucket to read objects from other buckets through server-side copy. This issue is fixed in version 4.34.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- b44cf51fe931bd75aa4d37ae766bea90d7f85ccd (Commit)
- c6cf5a5bd7c87694c8d71ab41571f1412170ab2a (Commit)

## Referenzen

- <https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-56wq-x3wv-3ff4>
- <https://github.com/seaweedfs/seaweedfs/pull/9929>
- <https://github.com/seaweedfs/seaweedfs/commit/b44cf51fe931bd75aa4d37ae766bea90d7f85ccd>
- <https://github.com/seaweedfs/seaweedfs/releases/tag/4.34>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55874) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_