CVE-2026-73849 emlog allows unauthenticated reinstallation via `install.php?action=reinstall`.
Unauthenticated attackers can reinstall Emlog to overwrite configuration and create a new administrator account, leading to full site takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73849?
CVE-2026-73849 is a critical missing authorization vulnerability in emlog, published on 14 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Emlog is an open source website building system. In 2.6.26 and earlier, install.php accepts action=reinstall without authentication and deliberately skips the already-installed check because the guard runs only when $act != 'reinstall'. A remote attacker can submit hostname, dbuser, dbpasswd, dbname, dbprefix, username, password, and email values to cause file_put_contents('config.php', $config) to overwrite the configuration with attacker-controlled database settings and create a new administrator account. No fixed version is available as of this review.
Weakness: CWE-306
Which versions are affected by CVE-2026-73849?
How do I fix CVE-2026-73849?
No fix has been published for CVE-2026-73849 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-73849 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73849 exists.
Sources
Also known as GHSA-v5qq-p8mp-3gxm.