Vulnerability details
CVE-2026-42300
l3montree-dev devguard
DevGuard: Unauthenticated identity assertion via `X-Admin-Token` header
CVSS 4.0
9.3Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| l3montree-dev | devguard | < 1.2.2 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-05-12
- Last updated
- 2026-05-13
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.25%
Probability of exploitation in 30 days
17.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-288Authentication Bypass Using an Alternate Path or Channel