CVE-2026-74880 openssl_encrypt before 1.4.0 Token Leakage via Query Parameters

Critical 9.3 Published 17 Aug 2026 Updated 8 Oct 2026

Attackers can steal refresh tokens from logs or headers because the library accepts them in URL query parameters, leading to unauthorized access.

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

What is CVE-2026-74880?

CVE-2026-74880 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 accept refresh tokens as URL query parameters in keyserver and telemetry server routes. Attackers can extract tokens from server logs, proxy logs, browser history, and HTTP Referer headers to gain unauthorized access.

Weakness: CWE-598

Which versions are affected by CVE-2026-74880?

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-2026-74880?

Upgrade openssl-encrypt to 1.4.0 or later.

Is CVE-2026-74880 being exploited?

There is no known exploitation of CVE-2026-74880 in the wild and no public exploit code.

All Jahlives Openssl Encrypt vulnerabilities

Sources

Also known as GHSA-4rh7-jwg9-m28m, GHSA-j2j2-c4gj-7cmc, PYSEC-2026-3759.