CVE-2026-86351 MISP User Homepage Validation Allows Authenticated Open Redirect via Protocol-Relative URL

Affected versions of MISP validate the user-configurable homepage by checking only whether the supplied path begins with /. That check is insufficient because protocol-relative URLs such as //attacker.example also begin with / but resolve to an external origin in browsers. The vulnerable homepage...

CVE-2026-86351

MISP (versions ≤2.5.45 ) is affected by an authenticated open redirect in the user-configurable homepage feature. The validation only checked whether the supplied value begins with /, which is insufficient because protocol-relative URLs such as //attacker.example also start with / but resolve to ...

EUVD-2026-72343

Affected versions of MISP validate the user-configurable homepage by checking only whether the supplied path begins with /. That check is insufficient because protocol-relative URLs such as //attacker.example also begin with / but resolve to an external origin in browsers. The vulnerable homepage...

CVE-2026-86351: URL Redirection to Untrusted Site

Affected versions of MISP validate the user-configurable homepage by checking only whether the supplied path begins with /. That check is insufficient because protocol-relative URLs such as //attacker.example also begin with / but resolve to an external origin in browsers. The vulnerable homepage...