CVE-2026-91923

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.

  • Published Sep 15, 2026
  • CVSS 8.3 high
  • 0.5% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-91923 at the National Vulnerability Database