CVE-2026-86259

OpenMAIC before 1.0.1 SSRF via Environment-Gated URL Validation

9.0 CriticalPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: Low
Availability: None

Exploit likelihood

0.42%Up 0.2 points since Sep 7, 2026

What each source reports

CVE List Score used9.0

OpenMAIC before 1.0.1 SSRF via Environment-Gated URL Validation

Record: CVE-2026-86259
CVSS 4.0: 9.0 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Weakness: CWE-918, CWE-306
Updated: 2026-11-02

EUVDEUVD-2026-721269.0

Record: EUVD-2026-72126
CVSS 4.0: 9.0 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-6j8v-fv4p-986p9.0

OpenMAIC before 1.0.1 skips server-side request forgery validation in non-production builds,...

Record: GHSA-6j8v-fv4p-986p
CVSS 4.0: 9.0 CriticalCVSS: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
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Weakness: CWE-306
Updated: 2026-11-02

NVD9.0

Record: CVE-2026-86259
CVSS 4.0: 9.0 CriticalCVSS: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
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Weakness: CWE-306, CWE-918
Updated: 2026-11-02

OSV9.0

OpenMAIC before 1.0.1 SSRF via Environment-Gated URL Validation

Record: CVE-2026-86259
CVSS 4.0: 9.0 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:N/SA:N
Weakness: CWE-306, CWE-918
Updated: 2026-11-02

Affected products

thu-maic openmaic

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	uziii2208/CVE-2026-86259	2026-09-14

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-86259 is a critical vulnerability (CVSS 9.0) in Thu-maic Openmaic, published September 6, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.42%, the 36th percentile. No source names a fixed version.