DevGuard: Unauthenticated identity assertion via `X-Admin-Token` header_CVE-2026-42300

9.3 / 10

CRITICAL

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

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.

Basic Information

ID CVE-2026-42300

Source GitHub_M

Published May 12, 2026 at 17:25

Affected Product

Vendor l3montree-dev

Product devguard

Version < 1.2.2

Affected Versions l3montree-dev devguard < 1.2.2

CWE Classification

CWE-288

References

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    "published": "2026-05-12T17:25:20.435Z",
    "modified": "2026-05-12T17:25:20.435Z",
    "type": "cve",
    "title": "DevGuard: Unauthenticated identity assertion via `X-Admin-Token` header",
    "source": "GitHub_M",
    "references": "https://github.com/l3montree-dev/devguard/security/advisories/GHSA-2g9v-7mr5-fgjg\nhttps://github.com/l3montree-dev/devguard/commit/6f38310bf93b2a63df3055038f4da82b1f4e6d9a",
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