CVE-2026-52793 Froxlor: API Authentication bypasses 2FA Authentication
Attackers with valid API keys can bypass two-factor authentication to access and modify sensitive server configuration data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-52793?
CVE-2026-52793 is a high-severity authentication bypass vulnerability in froxlor, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Froxlor is open source server administration software. Prior to 2.3.7, the API authentication path in lib/Froxlor/Api/FroxlorRPC.php and FroxlorRPC::validateAuth accepts an API key and secret for an administrator or customer account without checking type_2fa, validating a TOTP code, or invoking FroxlorTwoFactorAuth. The web interface requires a second factor for accounts with two-factor authentication enabled, but the API grants access after validating only the API credentials, expiration, API permission, and account status. An attacker who obtains an API key and secret for a protected account can call the available API functions without supplying the configured second factor, which can expose or modify customer data, domains, email and FTP accounts, databases, DNS records, and certificate material. This issue is fixed in version 2.3.7.
Weakness: CWE-287
Which versions are affected by CVE-2026-52793?
2 open source packages ship an affected version, including froxlor/froxlor.
| Package | Affected | Fixed in |
|---|---|---|
froxlor/froxlor Packagist | All versions | 2.3.7 |
froxlor/froxlor Packagist | All versions | 2.3.7 |
How do I fix CVE-2026-52793?
Upgrade froxlor/froxlor to 2.3.7 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-52793 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52793 exists.
Sources
Also known as GHSA-f9rx-7wf7-jr36.