{"id":"CVE-2026-81688","aliases":["PYSEC-2026-3795","GHSA-7c3q-gp4v-q29q"],"title":"openssl_encrypt versions before 1.4.9 store an unkeyed SHA-256 hash of the plaintext in the cleartext file header metadata. Attackers can…","summary":"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 …","severity":"none","vendor":"openssl-encrypt","product":"openssl-encrypt","ecosystem":"pip","affected":["openssl-encrypt < 1.4.9"],"patched":["openssl-encrypt 1.4.9"],"published":"2026-08-27","updated":"2026-09-03","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/PYSEC-2026-3795","references":[{"url":"https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-7c3q-gp4v-q29q"},{"url":"https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-plaintext-confirmation-oracle-via-sha-256"}],"tags":["osv","pip"],"epss":0.00198,"epssPercentile":0.09914,"ingestedAt":"2026-09-03T19:32:12.111Z","slug":"CVE-2026-81688","body":"## Overview\n\nopenssl_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.\n\n## Affected packages\n\n- `openssl-encrypt < 1.4.9`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `openssl-encrypt 1.4.9`","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}