EUVD-2026-66823
GHSA-647v-4254-wp99
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
PR:L confirmed by vendor vector; AC:H reflects gadget-chain dependency for meaningful impact; C/I/A:H reflects realistic RCE outcome when usable gadgets are present.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
Lifecycle Timeline
2DescriptionCVE.org
Spring Integration's JSON to object conversion uses the json__TypeId__ header to choose the deserialization target type, and resolves that header value to a class with ClassUtils.forName and no type/package allow-list. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier
AnalysisAI
Unsafe deserialization in Spring Integration exposes network-accessible, low-privilege attackers to arbitrary Java class instantiation by manipulating the json__TypeId__ message header, which is resolved via ClassUtils.forName without any type or package allowlist. All maintained Spring Integration branches are affected - 5.5.21 and earlier, 6.4.0-6.4.12, 6.5.0-6.5.10, 7.0.0-7.0.5, and 7.1.0 - making the exposure broad across the Spring ecosystem. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to control or inject the json__TypeId__ message header in a JSON message processed by Spring Integration's JSON-to-object conversion pipeline - a condition that arises when the application uses Spring Integration's JSON message converter with type-id header resolution enabled, which is the default behavior in affected versions. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD-assigned CVSS 3.1 score of 6.3 (Medium) with vector AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L reflects network exploitability by any low-privilege authenticated user, but rates impact conservatively at Low across all three dimensions - likely because actual impact is gadget-chain dependent and no confirmed RCE payload was evidenced at time of scoring. … 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 to the patched release for the applicable branch as specified in the VMware/Broadcom Spring security advisory at https://spring.io/security/cve-2026-47856 - exact fix versions are not independently confirmed in available intelligence at time of analysis and must be obtained from that advisory directly. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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