SSRF in Kubesphere
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (39.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/kubesphere/kubesphere (product)
- github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/… (technical-description)
- github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/… (technical-description)
- github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/… (technical-description)
- github.com/kubesphere/kubesphere/issues/6653 (issue-tracking)
- www.vulncheck.com/advisories/kubesphere-through-4.1.3-ssrf-via-git-credential-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91923?
- CVE-2026-91923 is a high-severity vulnerability in Kubesphere, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-09-15.
- How severe is CVE-2026-91923?
- High severity. CVSS v3 base score is 7.7 out of 10.