CVE-2026-30964

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.4Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

Published

March 10, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 6, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
githubMentions a patch (unverified)🟡 PoC Available

allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation · Advisory · web-auth/webauthn-framework · GitHub

https://github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr8-7ggm
github_commit Patch Available

commit b4cd9a4394c3 (web-auth/webauthn-framework)

Patch available: web-auth/webauthn-framework 5.2.4 (contains commit b4cd9a4394c3)

https://github.com/web-auth/webauthn-framework/commit/b4cd9a4394c35fcac6080fd2f84f4f58a30abc01
github_commit Patch Available

commit 535cc3c2dcbd (web-auth/webauthn-framework)

Patch available: web-auth/webauthn-framework 5.3.0 (contains commit 535cc3c2dcbd)

https://github.com/web-auth/webauthn-framework/commit/535cc3c2dcbd9c3dfd5e00a254ad4a984e5e7839

Affected Packages

(3 across 1 ecosystem)
Packagist(3)
PackageVulnerable rangeFix by version rangeDependents
web-auth/webauthn-framework5.2.0, 5.2.1, 5.2.2, 5.2.3
  • 5.2.0 up to 5.2.4: fixed in 5.2.4
—
web-auth/webauthn-lib5.2.0, 5.2.1, 5.2.2, 5.2.3
  • 5.2.0 up to 5.2.4: fixed in 5.2.4
—
web-auth/webauthn-symfony-bundle5.2.0, 5.2.1, 5.2.2, 5.2.3
  • 5.2.0 up to 5.2.4: fixed in 5.2.4
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 193 total refreshes for this CVE.

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Related CVEs(same product + same CWE)

Same product

2 shown

Packagist:web-auth/webauthn-lib · Packagist:web-auth/webauthn-framework

Frequently asked(5)

What is CVE-2026-30964?
CVE-2026-30964 is a medium vulnerability published on March 10, 2026. 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…
When was CVE-2026-30964 disclosed?
CVE-2026-30964 was first published on March 10, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-30964 actively exploited?
CVE-2026-30964 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-30964?
CVE-2026-30964 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-30964?
A fix for CVE-2026-30964 is available: update to the fixed version the vendor names in its advisory.

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