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CVE-2026-125370— Kubero 3.0.0 through 3.1.1 Authentication Bypass via Hardcoded JWT Secret

Quick assessment

Affected
kubero-dev kubero
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.

Kubero 3.0.0 至 3.1.1 版本中存在一个认证绕过漏洞。当 未设置时，攻击者可利用硬编码的备用签名密钥，伪造管理级 JWT 令牌。攻击者能够使用任意角色、用户组（userGroups）和权限声明对令牌进行签名，而 方法在验证时会直接信任这些声明，无需查询数据库。利用此漏洞，攻击者可接管流水线、应用程序、用户账户及 API 令牌。

CVSS 9.8 · Critical
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I. Basic Information for CVE-2026-125370

Vulnerability Information
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Vulnerability Title
Kubero 3.0.0 through 3.1.1 Authentication Bypass via Hardcoded JWT Secret
Source: CVE Program / CVE List V5
Vulnerability Description
Kubero 3.0.0 through 3.1.1 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to forge administrative JWTs by using a hardcoded fallback signing secret when JWT_SECRET is unset. Attackers can sign tokens with arbitrary role, userGroups and permissions claims, which JwtStrategy.validate() trusts without a database lookup, to take control of pipelines, applications, users and API tokens.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的密码学密钥
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kubero-dev kubero 3.0.0 ~ 3.1.1 -

II. Public POCs for CVE-2026-125370

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III. Intelligence Information for CVE-2026-125370

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Other References for CVE-2026-125370 (3)

IV. Related Vulnerabilities

Same product: kubero
Same vendor: kubero-dev
Same weakness: CWE-321