HIGH 8.7 NVD
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
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.
References
- https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-7c3q-gp4v-q29q
- https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-plaintext-confirmation-o
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-08-27 via NVD.
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