What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-14 · updated 2026-09-16
• Weakness: CWE-306

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.

Affected products

• emlog: through 2.6.26

References

• https://github.com/emlog/emlog/security/advisories/GHSA-v5qq-p8mp-3gxm
• https://github.com/emlog/emlog/security/advisories/GHSA-v5qq-p8mp-3gxm

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