VULNERABILITY INTELLIGENCE

CVE-2026-81688

CVSS score7.5 HIGH
EPSS probability0.27%
CISA KEVNot currently listed
Published2026-08-27
Last modified2026-09-02
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-311

Primary references