by Kastro
Paper/Archive/CVE-2026-86259

CVE-2026-86259

THU-MAIC OpenMAIC — OpenMAIC before 1.0.1 SSRF via Environment-Gated URL Validation

EPSS 0.4%public exploitCVSS 9.0
critical.is priorityof 100
44
CVSS 9.0 (CNA)9.0 / 10 × 3027.0Not in CISA KEV+300.0EPSS percentile 35.9.359 × 207.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

OpenMAIC before 1.0.1 skips server-side request forgery validation in non-production builds, allowing unauthenticated attackers to reach cloud instance metadata services. Attackers can supply arbitrary provider URLs via the x-base-url header or baseUrl parameter to access sensitive cloud credentials and metadata.

Affected

ProductAffectedFixed inSource
OpenMAIC< 1.0.11.0.1CNA

Scores by source

VulnCheck (CNA)9.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:N/SA:N
VulnCheck (CNA)7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

exploitgithub.com/THU-MAIC/OpenMAIC/security/advisories/GHSA-9m7h-vh2h-rc3wwriteupgithub.com/THU-MAIC/OpenMAIC/blob/v1.0.0/middleware.ts#L60-L63writeupgithub.com/THU-MAIC/OpenMAIC/blob/v1.0.0/app/api/generate/image/route.ts#L73-L78patchgithub.com/THU-MAIC/OpenMAIC/releases/tag/v1.0.1refgithub.com/THU-MAIC/OpenMAICwriteupvulncheck.com/advisories/openmaic-before-1.0.1-ssrf-via-environment-gated-url-validation