CVE-2026-81704 openssl_encrypt before 1.4.9 Weak Key Derivation via D-Bus

High 8.7 Published 27 Aug 2026 Updated 1 Oct 2026

Attackers can rapidly guess passwords for encrypted files due to weak key derivation, compromising data confidentiality.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-81704?

CVE-2026-81704 is a high-severity vulnerability in Jahlives Openssl Encrypt, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

openssl_encrypt versions before 1.4.9 contain a weak key derivation vulnerability in the D-Bus CryptoService.EncryptFile handler that uses unstretched SHA-256 instead of Argon2id. Attackers can perform offline password guessing against encrypted files roughly six to seven orders of magnitude faster than documented protection by exploiting the missing key stretching and hash rounds.

Weakness: CWE-916

Which versions are affected by CVE-2026-81704?

1 open source package ship an affected version, including openssl-encrypt. It affects 1 product.

Package	Affected	Fixed in
`openssl-encrypt` PyPI	All versions	`1.4.9`

Products include Jahlives Openssl Encrypt.

How do I fix CVE-2026-81704?

Upgrade openssl-encrypt to 1.4.9 or later.

Is CVE-2026-81704 being exploited?

There is no known exploitation of CVE-2026-81704 in the wild and no public exploit code.

All Jahlives Openssl Encrypt vulnerabilities

Sources

Also known as GHSA-9gxw-4vm6-8q2h, GHSA-v9r6-grch-fxw7, PYSEC-2026-3963.