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CVE

CVE-2026-42300

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

CVE-2026-42300

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

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42300.json, https://github.com/l3montree-dev/devguard/security/advisories/GHSA-2g9v-7mr5-fgjg, https://nvd.nist.gov/vuln/detail/CVE-2026-42300, https://github.com/l3montree-dev/devguard/commit/6f38310bf93b2a63df3055038f4da82b1f4e6d9a

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00257%
EPSS Percentile
0.17585%
Introduced Version
0
Fix Available
6f38310bf93b2a63df3055038f4da82b1f4e6d9a

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