Is CVE-2026-15556 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-15556?

CVE-2026-15556 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-15556

Description

A flaw was found in Picketlink's SP signature validation; a SAML response containing zero assertion elements matching the signature check can allow an attacker to forge a SAML response and auth as any principal with any roles on the protected application.