High severity7.5NVD Advisory· Published Aug 27, 2026

CVE-2026-81688

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.

Affected products

Jahlives/Openssl Encryptinferred2 versions
<1.4.9+ 1 more
- (no CPE)range: <1.4.9
- (no CPE)range: <1.4.9

Patches

Vulnerability mechanics

References

github.com/jahlives/openssl_encrypt/security/advisories/GHSA-7c3q-gp4v-q29qnvd
www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-plaintext-confirmation-oracle-via-sha-256nvd

News mentions

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cvss	0.488
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000