---
cve: "CVE-2026-49248"
severity: "HIGH"
cvss: 8.3
epss: "57%"
vendor: "theonedev"
kev: false
exploited: false
published: "2026-06-18 21:16:29"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T23:29:51+02:00"
---

# CVE-2026-49248

> 8.3 HIGH · 🧪 PoC

## Beschreibung

OneDev is a Git server with CI/CD, kanban, and packages. In versions 15.0.6 and below, TarUtils.untar() creates symbolic links verbatim from TAR entry getLinkName() without validating whether the target is an absolute path. A subsequent file entry in the same archive traverses the symlink, writing to arbitrary server-side locations. This is exploitable by any authenticated user with CI Job write access — no admin interaction required. This is an incomplete fix bypass of CVE-2021-21251 (GHSA-2w6j-wc8c-9mq2): that patch blocked .. path segments but did not address absolute symlink targets. This issue has been fixed in version 15.0.7.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 4f8684acebc4bfeefd3c7e23a34a4fd591cb27ad (Commit)

## Referenzen

- <https://github.com/theonedev/onedev/security/advisories/GHSA-55g8-94r5-cj37>
- <https://github.com/theonedev/onedev/commit/4f8684acebc4bfeefd3c7e23a34a4fd591cb27ad>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49248) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_