---
id: CVE-2026-91923
title: >-
  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
summary: >-
  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 ar…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-918
vendor: kubesphere
product: kubesphere
affected:
  - kubesphere <= 4.1.3
published: '2026-09-15'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:08:55.030'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91923'
references:
  - url: 'https://github.com/kubesphere/kubesphere'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/config/ks-core/templates/globalroles.yaml
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/pkg/kapis/resources/v1alpha2/handler.go
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/kubesphere/kubesphere/blob/3ef3a6bc98b790480577e87fbc75bee5b3438862/pkg/models/git/git.go
    label: disclosure@vulncheck.com
  - url: 'https://github.com/kubesphere/kubesphere/issues/6653'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/kubesphere-through-4.1.3-ssrf-via-git-credential-verification-endpoint
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00454
epssPercentile: 0.3668
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T17:15:05.557314Z'
ingestedAt: '2026-09-15T11:36:07.420Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.