CVE-2026-74900 | BDVDB-2026-360689 Detail

Description#

openssl_encrypt versions before 1.4.0 contain a critical vulnerability in pqc.py where KEM decapsulation failures silently fall back to simulation mode, generating a deterministic shared secret from only 16 bytes of the private key and publicly available encapsulated key data. Attackers who obtain 16 bytes of the private key can compute the shared secret and decrypt all ciphertext, as the fallback triggers on any KEM failure without raising an error.

Impact#

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Exploit#

History#

1. Version 12026-08-17Record published in the CVE List.
2. Version 22026-10-01Most recent update recorded in the CVE List.