CVE-2026-86259

HIGH 7.5

OpenMAIC before 1.0.1 SSRF via Environment-Gated URL Validation

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918 CWE-306
Vendor	thu-maic
Product	openmaic
Published	Sep 6, 2026
Last Updated	Sep 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

THU-MAIC / OpenMAIC

0 < 1.0.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 Tong Hoang Gia (uziii2208)