CVE-2026-91923

HIGH 7.7

KubeSphere through 4.1.3 SSRF via git credential verification endpoint

CVSS Score

7.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918
Vendor	kubesphere
Product	kubesphere
Published	Sep 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

kubesphere / kubesphere

0 ≤ 4.1.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/kubesphere/kubesphere/issues/6653 github.com: https://github.com/kubesphere/kubesphere github.com: https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/pkg/models/git/git.go github.com: https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/pkg/kapis/resources/v1alpha2/handler.go github.com: https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/config/ks-core/templates/globalroles.yaml vulncheck.com: https://www.vulncheck.com/advisories/kubesphere-through-4.1.3-ssrf-via-git-credential-verification-endpoint

Credits

🔍 George Chen