EUVD-2026-66842
GHSA-7mwm-q6x4-5h32
Severity by source
AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
PR:H confirmed by admin-only configuration access; AC:H for non-default feature; S:C because gateway fetches resources from external/internal systems beyond its own boundary.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
Lifecycle Timeline
2DescriptionCVE.org
Spring Cloud Gateway JsonToGrpcGatewayFilterFactory allows arbitrary Spring Resource locations for defining the proto descriptor. Spring Cloud Gateway 5.0.0 - 5.0.2 Spring Cloud Gateway 4.3.0 - 4.3.5 Spring Cloud Gateway 4.0.0 - 4.2.9 Spring Cloud Gateway 3.1.13 and earlier
AnalysisAI
Spring Cloud Gateway's JsonToGrpcGatewayFilterFactory permits an authenticated administrator to supply arbitrary Spring Resource location strings when defining the proto descriptor file. The gateway subsequently resolves these locations without restriction, enabling access to sensitive internal file paths, classpath resources, or remote endpoints via SSRF-like traversal - effectively granting the admin-level attacker read and potential integrity impact on systems beyond the gateway's own scope. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three concurrent conditions: (1) the attacker must possess high-privilege (admin or operator) credentials on the Spring Cloud Gateway instance, consistent with PR:H in the CVSS vector; (2) the gateway must have at least one route configured to use JsonToGrpcGatewayFilterFactory - this is a non-default feature that must be explicitly enabled per route; (3) the attacker must be able to modify or create gateway route definitions, either via the Actuator management API, configuration files, or a connected configuration service. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N) scores 7.7 (High) and signals a nuanced risk profile. … 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 Cloud Gateway to a version not listed in the affected ranges per the VMware/Spring security advisory at https://spring.io/security/cve-2026-47879 - the advisory should specify the exact patched releases (e.g., 5.0.3+, 4.3.6+, 4.2.10+, 3.1.14+) which are not confirmed in the provided data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Spring Cloud Gateway deployments running versions 3.0-5.x and audit which have JsonToGrpcGatewayFilterFactory in use; simultaneously review and strengthen administrator access controls to gateway configuration endpoints. …
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External POC / Exploit Code
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