CVE-2026-86259

OpenMAIC before 1.0.1 SSRF via Environment-Gated URL Validation

State: Published
Severity: 9.0 Critical
Published: Sep 6, 2026
Updated: Sep 24, 2026
Reserved: Sep 6, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	9.0 Critical	CVSS: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
3.1	7.5 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N	VulnCheck

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)
CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
OpenMAICTHU-MAIC	before 1.0.1Affected 1.0.1Not affected

References

GitHub Security Advisory (GHSA-9m7h-vh2h-rc3w)vendor-advisory
Fail-open access-code middleware at v1.0.0technical-description
NODE_ENV-gated SSRF validation at v1.0.0technical-description
OpenMAIC v1.0.1 Release Notespatchrelease-notes
https://github.com/THU-MAIC/OpenMAICproduct
VulnCheck Advisory: OpenMAIC before 1.0.1 SSRF via Environment-Gated URL Validationthird-party-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.