Webauthn Framework: allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation

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Summary

CVECVE-2026-30964
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-10 18:18:55 UTC
Updated2026-05-07 18:35:56 UTC
Descriptionweb-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.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS: 0.000190000 probability, percentile 0.052860000 (date 2026-05-12)

Problem Types: CWE-346 | CWE-346 CWE-346: Origin Validation Error

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
3.1CNADECLARED5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Spomky-labs Webauthn-lib All All All All
Application Spomky-labs Webauthn-symfony-bundle All All All All
Application Spomky-labs Webauthn Framwork All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Web-auth Webauthn-framework affected < 5.2.4 Not specified
CNA Web-auth Webauthn-lib affected < 5.2.4 Not specified
CNA Web-auth Webauthn-symfony-bundle affected < 5.2.4 Not specified

References

ReferenceSourceLinkTags
github.com/web-auth/webauthn-framework/commit/b4cd9a4394c35fcac6080fd2f8... [email protected] github.com Patch
github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Exploit, Vendor Advisory
github.com/web-auth/webauthn-framework/commit/535cc3c2dcbd9c3dfd5e00a254... [email protected] github.com Patch
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