CVE-2026-42206: OpenID Connect nonce generated but never validated — ID token replay attack

April 29, 2026 (updated May 13, 2026)

The roadiz/openid package generates an OIDC nonce in OAuth2LinkGenerator::generate() and includes it in the authorization request sent to the identity provider, but never stores it and never validates it on the callback. The OpenIdJwtConfigurationFactory validation chain does not include a nonce constraint, and OpenIdAuthenticator::authenticate() never checks the nonce claim in the returned ID token against a stored value.

References

github.com/advisories/GHSA-3gx8-q682-38mx
github.com/roadiz/core-bundle-dev-app/security/advisories/GHSA-3gx8-q682-38mx
nvd.nist.gov/vuln/detail/CVE-2026-42206

Code Behaviors & Features

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