CVE-2026-12272 Lightweight Cookie Notice <= 1.19 - Sensitive Information Exposure via W3TC_DYNAMIC_SECURITY Constant
Unauthenticated attackers can exploit a hardcoded security key to potentially inject arbitrary PHP code if W3 Total Cache is installed.
- 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-2026-12272?
CVE-2026-12272 is a medium-severity vulnerability in daext Lightweight Cookie Notice – Cookie Banner for Cookie Consent, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Lightweight Cookie Notice – Cookie Banner for Cookie Consent plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.19 This is due to the W3TC_DYNAMIC_SECURITY constant being hardcoded to a publicly known value. This makes it possible for unauthenticated attackers to know the W3 Total Cache mfunc security key, which when W3 Total Cache is installed may allow arbitrary PHP code injection.
Weakness: CWE-330
Which versions are affected by CVE-2026-12272?
How do I fix CVE-2026-12272?
No fix has been published for CVE-2026-12272 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-12272 being exploited?
There is no known exploitation of CVE-2026-12272 in the wild and no public exploit code.
Sources
Also known as GHSA-phxf-4j8m-r2jf.