CVE-2026-73849 CRITICAL

CVE-2026-73849: emlog allows unauthenticated reinstallation via `install.php?action=reinstall`.

Vendor Emlog
Product emlog
Weakness CWE-306 · Missing auth
Published August 14, 2026
Last update August 14, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 14, 2026 CVE published

Related vulnerabilities

04Related CVE