MEDIUM5.3

PYSEC-2026-3957

Quick fix

PYSEC-2026-3957 — 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 fail to authenticate recovery-slot presence in envelope-format encrypted files, allowing attackers to remove recovery slots without re-encrypting the payload. Attackers can modify the file header to delete recovery-slot fields and bypass authentication, silently removing recovery paths the owner deliberately added.

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-grhj-cpmg-f5mx[ADVISORY]
https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-authentication-bypass-via-recovery-slot-removal[ADVISORY]