CVE-2026-9084
UNKNOWN
NVD
CVSS Score
0
Severity
UNKNOWN
Published
May 20, 2026
Vendor
unknown
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.