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PYSEC-2026-3959

Quick fix

PYSEC-2026-3959 — openssl-encrypt: upgrade to the fixed version with the command below.

pip install --upgrade 'openssl-encrypt>=1.4.9'

Details

openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can precompute a single dictionary table and perform fleet-wide offline password guessing at hardware speed to recover user passwords.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/openssl-encrypt

Introduced in: 0Fixed in: 1.4.9

Fixpip install --upgrade 'openssl-encrypt>=1.4.9'

References

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-3v63-778v-3mvp[ADVISORY]
https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-weak-pepper-key-derivation[ADVISORY]