CVE-2026-81721 | BDVDB-2026-365698 Detail

Description#

openssl_encrypt before 1.4.9 fails to validate KDF cost parameters in encrypted file metadata and keystore headers, allowing attackers to trigger unbounded memory allocation. Attackers can craft malicious encrypted files declaring arbitrarily large Argon2, scrypt, or balloon KDF parameters to exhaust system memory and crash the process without authentication.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-08-27Record published in the CVE List.
2. Version 22026-10-01Most recent update recorded in the CVE List.