CVE-2026-86259

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.41% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 35.5% of scored records. A rank, not a probability.

NVD base score

9.0 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS 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

NVD analysis status

Deferred. NVD last modified this record on 2026-09-10.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-06 12:37Z1 MO AGO

Last updated

2026-09-24 14:21Z1 MO AGO

Reserved

2026-09-06

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.0)

CNA CVSS 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

Weaknesses

• CWE-306Missing Authentication for Critical FunctionBase
• CWE-918Server-Side Request Forgery (SSRF)Base

Data version

5.2

Document digest

875fcaa045350fddd5ff6627888cff2afbce30e3c58b130b0fc763b72bc03493

• github.comGitHub Security Advisory (GHSA-9m7h-vh2h-rc3w)https://github.com/THU-MAIC/OpenMAIC/security/advisories/GHSA-9m7h-vh2h-rc3wvendor-advisory
• github.comFail-open access-code middleware at v1.0.0https://github.com/THU-MAIC/OpenMAIC/blob/v1.0.0/middleware.ts#L60-L63technical-description
• github.comNODE_ENV-gated SSRF validation at v1.0.0https://github.com/THU-MAIC/OpenMAIC/blob/v1.0.0/app/api/generate/image/route.ts#L73-L78technical-description
• github.comOpenMAIC v1.0.1 Release Noteshttps://github.com/THU-MAIC/OpenMAIC/releases/tag/v1.0.1patchrelease-notes
• github.comhttps://github.com/THU-MAIC/OpenMAICproduct
• www.vulncheck.comVulnCheck Advisory: OpenMAIC before 1.0.1 SSRF via Environment-Gated URL Validationhttps://www.vulncheck.com/advisories/openmaic-before-1.0.1-ssrf-via-environment-gated-url-validationthird-party-advisory