PYSEC-2026-3795

vendorUSosv

view advisory published 2026-08-27Licence: CC-BY-4.0

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-81688US	high7.5OT elevated	0.27% (19th)	—	2026-08-27
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 con…

references

External citations — patches, advisories, analysis.

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-7c3q-gp4v-q29qADVISORY
https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-plaintext-confirmation-oracle-via-sha-256ADVISORY

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