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.

Link to headingWhat 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 provide updates as necessary

See the SAMLStorm report for more details on the vulnerability, and reach out to Vercel Support if you have questions.