Cloudanix VulnDB

CVE-2026-9084

None

CVSS

—

EPSS

0.2%

Published

May 20, 2026

CISA due date

—

The record

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.

Affected packages

Ecosystem Package Introduced Fixed

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