EUVD-2026-66859
GHSA-7p67-m4j8-h4vx
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unenforced buffer limit (CWE-770) causes memory exhaustion, so impact is availability-only (A:H); C/I set to N as no data disclosure or integrity loss follows, giving 7.5 not 9.8.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
Lifecycle Timeline
3DescriptionCVE.org
A Spring WebFlux application that relies on the Aalto XML processor to parse XML input does not correctly enforce the maxInMemorySize limit. 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 5.2.25.RELEASE and earlier
Articles & Coverage 1
AnalysisAI
Denial of service in Spring Framework WebFlux applications (5.2.25.RELEASE and earlier, 5.3.0-5.3.49, 6.0.0-6.0.30, 6.1.0-6.1.28, 6.2.0-6.2.19, 7.0.0-7.0.8) occurs when the Aalto XML processor is used to parse request bodies, because the maxInMemorySize buffering limit is not correctly enforced. Remote attackers can submit oversized XML to trigger unbounded in-memory buffering and exhaust heap memory. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target run a Spring WebFlux (reactive) application AND that it use the Aalto XML processor to decode XML request bodies AND expose at least one endpoint that accepts attacker-supplied XML. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals conflict and should be reconciled before prioritization. … 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 a fixed maintenance release in each supported line as published in the Spring advisory at https://spring.io/security/cve-2026-47891; the input does not enumerate exact fixed version numbers, so treat the patched build for your line (e.g. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all production Spring Framework WebFlux deployments and document which versions are deployed-specifically flag deployments running 5.2.0-5.2.25, 5.3.0-5.3.49, 6.0.0-6.0.30, 6.1.0-6.1.28, 6.2.0-6.2.19, or 7.0.0-7.0.8; audit which applications use the Aalto XML processor for request parsing. …
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