CVE-2026-41707: Spring Security DPoPProofJwtDecoderFactory vulnerable to DPoP Proof Replay

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-25 · updated 2026-09-24
Weakness: CWE-294

Description

Authentication Bypass by Capture-replay vulnerability in Spring Spring Security allows 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. This issue affects Spring Security: 7.1.0, from 7.0.0 through 7.0.6, and from 6.5.0 through 6.5.11.

Affected products

Spring Security: from 6.5.0 before 6.5.12; from 7.0.0 before 7.0.6.1; from 7.1.0 before 7.1.0.1 — fixed in 6.5.12, 7.0.6.1, 7.1.0.1
Spring Security: from 7.0.0 through 7.0.6; from 6.5.0 through 6.5.11; 7.1.0

How to fix

Upgrade to a fixed version: Spring Security 6.5.12, 7.0.6.1, 7.1.0.1. Check the vendor advisory for mitigations.

References

https://spring.io/security/cve-2026-41707

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