EUVD-2026-66860
GHSA-9qf2-26p9-2q2q
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Remote, unauthenticated, low-complexity pre-flight request bypasses a header-predicate gate, yielding limited unauthorized access (C:L/I:L) rather than full compromise; availability is unaffected.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
Lifecycle Timeline
4DescriptionCVE.org
A WebFlux application using functional endpoints and deployed with DispatcherServlet may be vulnerable to a header predicate bypass in a pre-flight request. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring Framework 6.0.0 - 6.0.30 Spring Framework 5.3.0 - 5.3.49 Spring Framework 5.2.5.RELEASE - 5.2.25.RELEASE
AnalysisAI
Authorization bypass in Spring Framework WebFlux functional-endpoint applications deployed on DispatcherServlet allows an attacker to defeat header-based route predicates by sending a CORS pre-flight (OPTIONS) request, reaching routes that should have been gated by header conditions. It affects Spring Framework 5.2.5-5.2.25, 5.3.0-5.3.49, 6.0.0-6.0.30, 6.1.0-6.1.28, 6.2.0-6.2.19, and 7.0.0-7.0.8 in the specific WebFlux-functional-plus-DispatcherServlet deployment mode. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a very specific stack: a Spring WebFlux application using functional endpoints (RouterFunction DSL) AND deployed with DispatcherServlet (the servlet bridge, not a native reactive runtime) AND using header predicates to route or restrict access. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals conflict sharply and should be weighed carefully. … 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 | Upgrade Spring Framework to a fixed maintenance release on your branch as directed by the Spring advisory at https://spring.io/security/cve-2026-47892; the input data lists affected ranges but does not state exact fixed build numbers, so confirm the precise patched version (typically the next patch above the listed ceilings, e.g. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Java applications using Spring Framework versions 5.2.5-7.0.8 with WebFlux functional endpoints deployed on DispatcherServlet, and review access logs for suspicious OPTIONS requests to protected endpoints that may indicate exploitation attempts. …
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Same weakness CWE-863 – Incorrect Authorization
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External POC / Exploit Code
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