Authentication libraries receive security patches — CVEs in next-auth, @supabase/supabase-js, and similar packages have historically enabled token forgery, session bypass, and privilege escalation. CWE-1395 (Dependency on Vulnerable Third-Party Component) and OWASP A06 (Vulnerable and Outdated Components) directly cover this. SLSA L2 supply-chain provenance requires component currency verification. A library that is multiple major versions behind may lack patches for known exploitable vulnerabilities and lose access to security advisory channels entirely.
Info because version lag does not immediately indicate exploitation, but outdated auth libraries may contain known, publicly documented vulnerabilities with available exploits.
Check installed versions against latest stable releases and scan for known advisories:
# Check current vs. latest for common auth libraries
npm outdated next-auth @clerk/nextjs @supabase/supabase-js lucia @auth0/nextjs-auth0 2>/dev/null
# Check for known security advisories
npm audit --production 2>/dev/null | grep -i auth
Enable Dependabot or Renovate via .github/dependabot.yml for automated update PRs. Pin auth library versions in package.json to a specific minor version and use the PR-based update workflow to review changelogs before merging. Do not auto-merge major version bumps for auth libraries — review the changelog for breaking changes in session handling.
ID: saas-authentication.social-auth.auth-library-version
Severity: info
What to look for: Identify the primary authentication library from package.json. Check the installed version against the latest stable release. Libraries to check: next-auth/authjs, @clerk/nextjs, @supabase/supabase-js, lucia, better-auth, firebase, @auth0/nextjs-auth0. A version within 2 major versions of current is acceptable. Check if any known security advisories apply to the installed version. Count every authentication-related dependency and enumerate each with its current version and latest available version.
Pass criteria: The auth library is within 2 major versions of the current stable release and has no known critical security advisories. At least 1 implementation must be confirmed.
Fail criteria: The auth library is more than 2 major versions behind, or has a known critical security advisory for the installed version.
Skip (N/A) when: No recognized auth library found. Signal: custom auth implementation with no third-party auth library.
Detail on fail: "next-auth v4.x installed — v5 (AuthJS) is the current major version. Check for any security advisories affecting v4" or "@supabase/supabase-js is 3 minor versions behind current — check changelog for security patches".
Remediation: Auth libraries receive security patches — staying reasonably current ensures you benefit from fixes. Check the library's changelog and security advisories to determine if updating is urgent:
# Check current vs. latest auth library versions
npm outdated next-auth @clerk/nextjs @supabase/supabase-js lucia @auth0/nextjs-auth0 2>/dev/null
# Check for known advisories
npm audit --production 2>/dev/null | grep -i auth
Pin versions in package.json and configure Dependabot or Renovate in .github/ for automated update PRs.