We have deployed a proactive security update to the Vercel Firewall, protecting against a recently disclosed vulnerability in the xml-crypto package, dubbed SAMLStorm (CVE-2025-29774 and CVE-2025-29775). This vulnerability, which affects various SAML implementations, could allow attackers to bypass authentication mechanisms.
What This Means for Vercel Customers
Automatic protection with the Vercel Firewall: Vercel Firewall automatically mitigates this risk for you, but updating xml-crypto is still recommended
Update xml-crypto: If you're using xml-crypto package 6.0.0 and earlier, or a package that depends on xml-crypto, update to 6.0.1, 3.2.1, or 2.1.6 for the patched versions
We'll continue to monitor for new developments and...