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

Quick assessment

Affected
kubesphere kubesphere
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

KubeSphere 4.1.3 及之前版本存在服务端请求伪造（SSRF）漏洞。该漏洞位于 Git 凭证验证端点，该端点会接受未经验证的、由调用方提供的 URL，且没有设置白名单限制。经过身份验证的攻击者可以提供任意 URL 以访问内部服务，并利用该端点的错误响应处理机制，从任意命名空间中的 Secrets 中泄露基于 Basic-Auth 的凭证。

CVSS 7.7 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-91923

Vulnerability Information
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Vulnerability Title
KubeSphere through 4.1.3 SSRF via git credential verification endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kubesphere kubesphere 0 ~ 4.1.3 -

II. Public POCs for CVE-2026-91923

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III. Intelligence Information for CVE-2026-91923

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Patches & Fixes for CVE-2026-91923 (1)

Vendor Advisories for CVE-2026-91923 (1)

News Coverage for CVE-2026-91923 (1)

Other References for CVE-2026-91923 (2)

IV. Related Vulnerabilities

Same product: kubesphere
Same vendor: kubesphere
Same weakness: CWE-918

V. Comments for CVE-2026-91923

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