Improper access control in Spring Security - CVE-2026-41707
Published: August 28, 2026
Vulnerability identifier: #VU146238
CSH Severity: Medium
CVSS v4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-41707
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access and impersonate the victim.
The vulnerability exists due to improper access control in DPoPProofJwtDecoderFactory when processing DPoP proofs and caching jti claims. A remote attacker can flood the server with dummy requests to evict a legitimate jti from the cache and replay an intercepted valid DPoP proof to gain unauthorized access and impersonate the victim.
Exploitation requires intercepting a legitimate user's valid DPoP proof.
Affected software
Spring Security
How to mitigate CVE-2026-41707
Install security update from vendor's website.
Spring Security - addressed in versions 6.5.12, 7.0.6.1, 7.0.7, 7.1.0.1, 7.1.1