---
cve: "CVE-2026-91923"
severity: "HIGH"
cvss: 8.3
epss: "27%"
vendor: "kubesphere"
kev: false
exploited: false
published: "2026-09-15 11:17:12"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T00:01:17+02:00"
---

# CVE-2026-91923

> 8.3 HIGH · 🧪 PoC

## Beschreibung

KubeSphere through 4.1.3 contains a server-side request forgery vulnerability in the git credential verification endpoint that accepts unvalidated caller-supplied URLs without allowlist restrictions. Authenticated attackers can supply arbitrary URLs to reach internal services and exfiltrate basic-auth credentials from Secrets in any namespace by leveraging the endpoint's error response handling.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 3ef3a6bc98b790480577e87fbc75bee5b3438862 (Commit)

## Referenzen

- <https://github.com/kubesphere/kubesphere/issues/6653>
- <https://github.com/kubesphere/kubesphere>
- <https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/pkg/models/git/git.go>
- <https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/pkg/kapis/resources/v1alpha2/handler.go>
- <https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/config/ks-core/templates/globalroles.yaml>
- <https://www.vulncheck.com/advisories/kubesphere-through-4.1.3-ssrf-via-git-credential-verification-endpoint>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-91923) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_