emlog allows unauthenticated reinstallation via `install.php?action=reinstall`. (CVE-2026-73849) | HOL Guard CVE

Critical · CVSS 9.8CVE-2026-73849

emlog allows unauthenticated reinstallation via `install.php?action=reinstall`.

Answer in brief

CVE-2026-73849 records a Critical severity (CVSS 9.8) vulnerability in emlog allows unauthenticated reinstallation via `install.php?action=reinstall`.. The current sources do not mark it as known exploited. The current feed maps emlog/emlog (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 14, 2026Updated Sep 16, 2026Source checked Sep 29, 2026First seen by HOL Aug 14, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps emlog/emlog (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
emlog/emloggeneric	<= 2.6.26	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for emlog/emlog.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 14, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.