CVE-2026-74876 openssl_encrypt before 1.4.0 Unverified Key Bundle Encryption

Critical 9.3 Published 17 Aug 2026 Updated 8 Oct 2026

Attackers can inject unverified public keys to encrypt data, potentially leaking secrets due to missing signature verification in key bundle creation.

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

What is CVE-2026-74876?

CVE-2026-74876 is a critical vulnerability in Jahlives Openssl Encrypt, published on 17 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 1.4.0 contain a vulnerability in PublicKeyBundle.from_dict() that creates key bundles from untrusted data without verifying signatures. Attackers can call from_dict() followed by to_identity() without signature verification to encrypt data using attacker-controlled public keys, leaking secrets.

Weakness: CWE-347

Which versions are affected by CVE-2026-74876?

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

Package	Affected	Fixed in
`openssl-encrypt` PyPI	All versions	`1.4.0`
`openssl-encrypt` PyPI	All versions	`1.4.0`
`openssl-encrypt` PyPI	All versions	`1.4.0`

Products include Jahlives Openssl Encrypt.

How do I fix CVE-2026-74876?

Upgrade openssl-encrypt to 1.4.0 or later.

Is CVE-2026-74876 being exploited?

There is no known exploitation of CVE-2026-74876 in the wild and no public exploit code.

All Jahlives Openssl Encrypt vulnerabilities

Sources

Also known as GHSA-723w-crw6-p9hx, GHSA-8h88-gxp3-j7pg, PYSEC-2026-3756.