CVE-2026-91923 KubeSphere through 4.1.3 SSRF via git credential verification endpoint
Authenticated attackers can exploit an SSRF vulnerability in KubeSphere to access internal services and exfiltrate credentials from Kubernetes Secrets.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91923?
CVE-2026-91923 is a high-severity server-side request forgery vulnerability in kubesphere, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-91923?
How do I fix CVE-2026-91923?
No fix has been published for CVE-2026-91923 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-91923 being exploited?
There is no known exploitation of CVE-2026-91923 in the wild and no public exploit code.
Sources
Also known as GHSA-847j-gj2f-78j9.