CVE-2026-1490 Auth bypass in Spam protection, Honeypot, Anti-Spam by CleanTalk
Unauthenticated attackers can bypass authorization via DNS spoofing to install arbitrary plugins, potentially leading to remote code execution on sites with invalid API keys.
- 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-2026-1490?
CVE-2026-1490 is a critical authentication bypass vulnerability in Spam protection, Honeypot, Anti-Spam by CleanTalk, published on 15 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Spam protection, Anti-Spam, FireWall by CleanTalk plugin for WordPress is vulnerable to unauthorized Arbitrary Plugin Installation due to an authorization bypass via reverse DNS (PTR record) spoofing on the 'checkWithoutToken' function in all versions up to, and including, 6.71. This makes it possible for unauthenticated attackers to install and activate arbitrary plugins which can be leveraged to achieve remote code execution if another vulnerable plugin is installed and activated. Note: This is only exploitable on sites with an invalid API key.
Weakness: CWE-350
Which versions are affected by CVE-2026-1490?
How do I fix CVE-2026-1490?
No fix has been published for CVE-2026-1490 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-1490 being exploited?
There is no known exploitation of CVE-2026-1490 in the wild and no public exploit code.
Sources
Also known as GHSA-r6q3-r9p8-6prh.