CVE-2025-59941: go-f3 Vulnerable to Cached Justification Verification Bypass

A vulnerability exists in go-f3’s justification verification caching mechanism where verification results are cached without properly considering the context of the message. An attacker can bypass justification verification by:

1. First submitting a valid message with a correct justification
2. Then reusing the same cached justification in contexts where it would normally be invalid

This occurs because the cached verification does not properly validate the relationship between the justification and the specific message context it’s being used with.