CVEvulnerability

CVE-2026-9084

6.0 MEDIUM Published 2026-05-20 Modified 2026-07-23 Official page ↗
Status
Awaiting Analysis
Published
2026-05-20
Last modified
2026-07-23
Assigner
5a6e4751-2f3f-4070-9419-94fb35b644e8
CVSS 4.0 (5a6e4751-2f3f-4070-9419-94fb35b644e8)
6.0 MEDIUM — CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/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
Weaknesses
CWE-287

Description

MISP’s OIDC authentication plugin allowed automatic linking of an OIDC identity to an existing local user account based on the email claim when the local account had no stored sub value. Under insecure or untrusted IdP configurations where email ownership is not enforced, an attacker with a valid OIDC token could assert a victim’s email address and authenticate as that user, leading to account takeover.

Related

Weakness · CWE (1)

  • CWE-287 Improper Authentication weakness

References