CVE-2026-86259

9.0 CRITICAL 0.4% exploit odds Fix listed Auth & access Server

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-09-06 13:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-09-10 19:58 UTC Last updatedMost recent change to the record

Details

Published: 2026-09-06 13:17 UTC
Last modified: 2026-09-10 19:58 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-306 · Missing authentication
Record status: Deferred

Attack profile CVSS 4.0 · 9.0

Attack vector: Network
Complexity: Low
Attack requirements: Present
Privileges needed: None
User interaction: None
Confidentiality: High
Integrity: Low
Availability: None

Raw vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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Fix and advisories

References

NVD record · CVE.org record