EUVD-2026-66639
GHSA-326h-rh66-6gp9
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
AC:H reflects the mandatory distributed session store requirement; PR:N because the attacker bypasses authentication without prior credentials; no availability impact.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
2DescriptionCVE.org
An application using Spring Security's WebAuthn support may be vulnerable to user verification bypass when using a distributed HTTP session store. Spring Security 7.1.0 Spring Security 7.0.0 - 7.0.6 Spring Security 6.5.0 - 6.5.11 Spring Security 6.4.0 - 6.4.18
Articles & Coverage 1
AnalysisAI
WebAuthn user verification bypass in Spring Security exposes applications to authentication circumvention when a distributed HTTP session store is in use. Affected versions span Spring Security 6.4.x through 7.1.0, meaning a broad range of enterprise Spring Boot applications leveraging passwordless/FIDO2 authentication are at risk. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Two specific, non-default conditions must both be present: (1) the application must have Spring Security's WebAuthn support explicitly enabled and deployed for user authentication, and (2) the application must be configured with a distributed HTTP session store (e.g., Spring Session backed by Redis, Hazelcast, JDBC, or another cluster-aware store). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 7.4 (High) vector AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N accurately reflects the risk profile: network-exploitable with no authentication required, but constrained to high complexity (AC:H) because exploitation requires a specific, non-default deployment - both WebAuthn support and a distributed HTTP session store must be explicitly configured. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The vendor advisory at https://spring.io/security/cve-2026-47841 should be consulted for exact patched versions; specific fix versions were not included in the available intelligence data, so the patch version is confirmed available per vendor advisory but cannot be independently verified from provided references alone. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Spring Boot applications running Spring Security 6.4.x-7.1.0 with distributed HTTP session stores and WebAuthn enabled, and restrict their network access. …
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External POC / Exploit Code
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