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CVE-2026-42300— DevGuard: Unauthenticated identity assertion via `X-Admin-Token` header

Quick assessment

Affected
l3montree-dev devguard
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.

devguard是L3montree开源的一款软件供应链漏洞管理平台。 devguard 1.2.2之前版本存在安全漏洞，该漏洞源于SessionMiddleware接受客户端提供的X-Admin-Token HTTP请求头，并在没有Kratos会话cookie时将其原始字符串值用作经过身份验证的用户ID，可能导致未经身份验证的攻击者知道或猜测目标用户的Kratos身份UUID后以该用户身份发出请求，若目标用户为组织管理员或所有者，则攻击者可完全控制该组织的DevGuard资源。

AI Predicted 8.1 Difficulty: Easy EPSS 0.43% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
l3montree-dev devguard < 1.2.2 affected
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I. Basic Information for CVE-2026-42300

Vulnerability Information
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Vulnerability Title
DevGuard: Unauthenticated identity assertion via `X-Admin-Token` header
Source: CVE Program / CVE List V5
Vulnerability Description
DevGuard provides vulnerability management for the full software supply chain. Prior to 1.2.2, the SessionMiddleware accepts a client-supplied X-Admin-Token HTTP request header and uses its raw string value as the authenticated userID when no Kratos session cookie is present. An unauthenticated attacker who knows or can guess a target user's Kratos identity UUID can issue requests as that user. Where the target user is an organisation admin or owner, this gives the attacker full control over that organisation's DevGuard resources. This vulnerability is fixed in 1.2.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
devguard 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
devguard是L3montree开源的一款软件供应链漏洞管理平台。 devguard 1.2.2之前版本存在安全漏洞，该漏洞源于SessionMiddleware接受客户端提供的X-Admin-Token HTTP请求头，并在没有Kratos会话cookie时将其原始字符串值用作经过身份验证的用户ID，可能导致未经身份验证的攻击者知道或猜测目标用户的Kratos身份UUID后以该用户身份发出请求，若目标用户为组织管理员或所有者，则攻击者可完全控制该组织的DevGuard资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
l3montree-dev devguard < 1.2.2 -

II. Public POCs for CVE-2026-42300

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III. Intelligence Information for CVE-2026-42300

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Patches & Fixes for CVE-2026-42300 (1)

Vendor Advisories for CVE-2026-42300 (1)

IV. Related Vulnerabilities

Same product: devguard
Same vendor: l3montree-dev
Same weakness: CWE-288

V. Comments for CVE-2026-42300

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