Secret disclosure via reusable finalized cipher state

Cryptographic state handling in Deno before 2.6.0 allows remote attackers to recover server secrets through repeated cipher use. The node:crypto Cipheriv and Decipheriv objects fail to record that final() completed, so later update() or final() calls reuse the native cipher context. Exploitation requires an application to expose attacker-influenced access to a persistent cipher object; repeated encryption supports brute-force or refined secret-recovery attacks.