Vulnerability Details CVE-2026-81688
openssl_encrypt versions before 1.4.9 store an unkeyed SHA-256 hash of the plaintext in the cleartext file header metadata. Attackers can read this hash without the password to confirm guessed plaintexts offline or fingerprint identical plaintexts across separately-encrypted files.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 9.6%
CVSS Severity
CVSS v3 Score 7.5