CVE-2026-111862 Rank Math SEO PRO 3.0.123 - Unauthenticated Embedded Malicious Code
Attackers can compromise websites via malicious code injected into specific Rank Math SEO PRO plugin packages, leading to data theft and persistent access.
- 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-2026-111862?
CVE-2026-111862 is a critical vulnerability in RankMath Rank Math SEO PRO, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Rank Math SEO PRO for WordPress is affected by a supply-chain compromise in a subset of version 3.0.123 packages downloaded or updated between October 15, 2026 at 20:02 UTC and October 16, 2026 at 07:12 UTC. Rank Math states that the affected plugin files contained malware that could compromise a website if the plugin was activated and directs sites that activated an affected package to treat the website as compromised. The malware may establish persistent access, communicate with rank1cdn[.]com, recreate hidden backdoors on page visits, and expose WordPress credentials, database credentials, API keys, and other secrets accessible to the web server. Rank Math identifies three malicious wp_options keys, hidden PHP backdoors, unauthorized administrator accounts, a fake WordPress core file, PHP-executable .cache files, and a system cron marker as incident indicators. Only packages obtained during the vendor-confirmed window are claimed as affected; version 3.0.123 alone is not sufficient to establish compromise. Rank Math removed the affected files and released version 3.0.124 as the clean replacement.
Weakness: CWE-506
Which versions are affected by CVE-2026-111862?
How do I fix CVE-2026-111862?
No fix has been published for CVE-2026-111862 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111862 being exploited?
There is no known exploitation of CVE-2026-111862 in the wild and no public exploit code.
Sources
Also known as GHSA-6qfj-hq55-w68p.