Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck

CVE-2026-91923KubeSphere through 4.1.3 SSRF via git credential verification endpoint

High 7.7

In plain English

A high-severity server-side request forgery in kubesphere from kubesphere. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.5%top 60.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
kubesphere	kubesphere	0 – through 4.1.3

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

GitHub Issue #6653 issue-tracking
https://github.com/kubesphere/kubesphere product
git.go - gitReadVerifyWithBasicAuth passes remoteUrl to origin.List unvalidated technical-description
handler.go - VerifyGitCredential returns the go-git error to the caller technical-description
globalroles.yaml - authenticated GlobalRole grants create on resources.kubesphere.io git technical-description
VulnCheck Advisory: KubeSphere through 4.1.3 SSRF via git credential verification endpoint third-party-advisory