EUVD-2026-66187
GHSA-3488-4mh8-47j4
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Network-based but requires prior token interception (AC:H); no credentials needed to flood cache (PR:N); full impersonation yields C:H and I:H with no availability impact.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
Lifecycle Timeline
2DescriptionCVE.org
Spring Security's DPoPProofJwtDecoderFactory contains a cache-based replay attack vulnerability. The internal cache storing JWT ID claims has a strict size limit, allowing attackers to evict legitimate entries by flooding the server with dummy requests, then replay intercepted valid DPoP proofs. Spring Security 7.1.0 Spring Security 7.0.0 - 7.0.6 Spring Security 6.5.0 - 6.5.11
Articles & Coverage 1
AnalysisAI
DPoP proof replay attack in Spring Security's DPoPProofJwtDecoderFactory allows unauthenticated network attackers to bypass token binding protections by evicting cached JWT ID entries through request flooding, then replaying captured valid DPoP proofs to impersonate legitimate users. Affected versions span Spring Security 6.5.0-6.5.11, 7.0.0-7.0.6, and 7.1.0, impacting any Java application using Spring Security's DPoP-based OAuth 2.0 validation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target application to be using Spring Security's DPoPProofJwtDecoderFactory for DPoP proof validation - this is an explicitly configured, non-default feature enabled for OAuth 2.0 token-binding deployments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.4 (High) vector AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N is well-calibrated: AC:H correctly reflects the multi-step prerequisites (token interception plus timed cache-flooding), while C:H and I:H accurately represent full token impersonation capability. … 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 | The primary remediation is to upgrade Spring Security to a fixed version per the vendor advisory at https://spring.io/security/cve-2026-41707 - exact patched release numbers were not independently confirmed from available data, so consult the advisory directly before applying. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, scan all Java environments to identify Spring Security installations running versions 6.5.0-6.5.11, 7.0.0-7.0.6, or 7.1.0 in production, prioritizing systems with DPoP-enabled OAuth 2.0 token validation. …
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External POC / Exploit Code
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