CVE-2026-24894 FrankenPHP leaks session data between requests in worker mode
Attackers can access other users' session data in FrankenPHP worker mode due to improper session reset between requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-24894?
CVE-2026-24894 is a high-severity vulnerability in frankenphp, published on 12 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FrankenPHP is a modern application server for PHP. Prior to 1.11.2, when running FrankenPHP in worker mode, the $_SESSION superglobal is not correctly reset between requests. This allows a subsequent request processed by the same worker to access the $_SESSION data of the previous request (potentially belonging to a different user) before session_start() is called. This vulnerability is fixed in 1.11.2.
Which versions are affected by CVE-2026-24894?
3 open source packages ship an affected version, including github.com/dunglas/frankenphp. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/dunglas/frankenphp Go | All versions | 1.11.2 |
github.com/dunglas/frankenphp Go | All versions | 1.11.2 |
github.com/dunglas/frankenphp Go | All versions | 1.11.2 |
Products include Php Frankenphp.
How do I fix CVE-2026-24894?
Upgrade github.com/dunglas/frankenphp to 1.11.2 or later.
Is CVE-2026-24894 being exploited?
There is no known exploitation of CVE-2026-24894 in the wild and no public exploit code.
Other vulnerabilities in frankenphp
Sources
Also known as GHSA-r3xh-3r3w-47gp, GO-2026-4489.