CVE-2026-91923: Kubesphere

High severity, CVSS 7.7. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Kubesphere Kubesphere: up to and including 4.1.3

Published 2026-09-15. Last modified 2026-09-24.