rootvector2 commented on PR #3625:
URL: https://github.com/apache/cxf/pull/3625#issuecomment-6394128005

   Not the same code path. #3622 only touched the WS-Security 
`JCacheReplayCache` in `rt/ws/security` (the WSS4J `ReplayCache.addIfAbsent` 
override). The JAX-RS SAML SSO module has its own `TokenReplayCache` interface 
with separate `EHCacheTokenReplayCache` / `JCacheTokenReplayCache` 
implementations, and `SAMLSSOResponseValidator.validateSubjectConfirmation` on 
main still does `replayCache.contains(id)` followed by `replayCache.putId(id, 
expires)`, so concurrent POSTs of the same captured response are all accepted. 
I found it while checking whether the SSO side had the same pattern after 
#3622. This PR is the equivalent fix for that module: 
`TokenReplayCache.putIdIfAbsent` backed by `putIfAbsent` in both caches, and 
the validator switched over to it.


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