CVE-2026-81688

HighCVSS 7.5/10Last modified Sep 2, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-311

Affected software

No affected versions have been published.

Timeline

Published
Aug 27, 2026
Last modified
Sep 2, 2026
NVD status
Analyzed

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CVE-2026-81688: High severity, CVSS 7.5 | Vulnix