CVE-2026-47234 Admidio writes session IDs and auto-login cookie values to application logs
Attackers with log access can steal session and auto-login cookies to hijack user accounts in Admidio when debug logging is enabled.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47234?
CVE-2026-47234 is a medium-severity vulnerability in admidio, published on 12 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Admidio is an open-source user management solution. Prior to version 5.0.10, when debug logging is enabled, `Session::setCookie()` logs full cookie values and `Session::start()` logs the current session ID. In a real Admidio deployment this includes both the active session cookie and the persistent auto-login cookie. Anyone with access to the log sink can recover live bearer-style credentials from the logs. Version 5.0.10 contains a fix.
Which versions are affected by CVE-2026-47234?
2 open source packages ship an affected version, including admidio/admidio.
| Package | Affected | Fixed in |
|---|---|---|
admidio/admidio Packagist | All versions | 5.0.10 |
admidio/admidio Packagist | All versions | 5.0.10 |
How do I fix CVE-2026-47234?
Upgrade admidio/admidio to 5.0.10 or later.
Is CVE-2026-47234 being exploited?
There is no known exploitation of CVE-2026-47234 in the wild and no public exploit code.
Sources
Also known as GHSA-mch8-wf3h-6x88.