CVE-2026-86259

CVSS 9.0 (critical) · published 2026-09-06

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.

Weakness: CWE-306, CWE-918

Source: NVD CVE-2026-86259

References

• https://github.com/THU-MAIC/OpenMAIC
• https://github.com/THU-MAIC/OpenMAIC/blob/v1.0.0/app/api/generate/image/route.ts#L73-L78
• https://github.com/THU-MAIC/OpenMAIC/blob/v1.0.0/middleware.ts#L60-L63
• https://github.com/THU-MAIC/OpenMAIC/releases/tag/v1.0.1
• https://github.com/THU-MAIC/OpenMAIC/security/advisories/GHSA-9m7h-vh2h-rc3w
• https://www.vulncheck.com/advisories/openmaic-before-1.0.1-ssrf-via-environment-gated-url-validation
• https://github.com/THU-MAIC/OpenMAIC/security/advisories/GHSA-9m7h-vh2h-rc3w

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