EUVD-2026-66856
GHSA-rxw8-5hfh-3jfv
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
RSocket endpoint is network-reachable with no authentication or interaction required; impact is availability-only as memory exhaustion does not affect data confidentiality or integrity.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
Lifecycle Timeline
3DescriptionCVE.org
A Spring RSocket application is exposed to a memory leak via a malformed SETUP frame. 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 5.2.0.RELEASE - 5.2.25.RELEASE
AnalysisAI
Memory exhaustion in Spring Framework's RSocket server implementation allows unauthenticated remote attackers to crash or degrade affected applications by sending malformed SETUP frames that trigger unreclaimed heap allocations. All actively maintained Spring Framework branches are affected - 5.2.x through 7.0.x - with the condition that the application must explicitly expose an RSocket endpoint. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target Spring application has explicitly configured and exposed an RSocket server endpoint - this is a non-default opt-in feature, not present in standard Spring MVC or Spring WebFlux HTTP deployments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 score is driven by an unauthenticated, network-accessible, low-complexity attack yielding full availability impact - a textbook remote DoS profile that warrants serious attention. … 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 Spring Framework release immediately above the affected range for your branch - consult the vendor advisory at https://spring.io/security/cve-2026-47888 for confirmed fixed versions, as exact patch release numbers are not specified in currently available data and should not be inferred. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all applications explicitly exposing RSocket endpoints across your Spring Framework deployments (versions 5.2.x through 7.0.x) and document their network exposure. …
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Same weakness CWE-401 – Memory Leak
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External POC / Exploit Code
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