CVE-2026-42300CWE-288

DevGuard: Unauthenticated identity assertion via `X-Admin-Token` header

Critical · published May 12, 2026

CVSS v4.0
9.3
EPSS
0%
Percentile
36.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
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
EPSS
0.00435 · 36.8th percentile
Weakness
CWE-288 · Authentication Bypass Using an Alternate Path or Channel
Published
2026-05-12T17:25Z
EPSS history
Timeline
  • 12 MAY 17:25Z
    DevGuard: Unauthenticated identity assertion via `X-Admin-Token` header
    cvelistv5