CVE-2026-72574 picocms Pico - Host Header Injection Enables Script Source Hijacking
Unauthenticated attackers can hijack script sources via Host header injection in Pico CMS, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-72574?
CVE-2026-72574 is a medium-severity vulnerability in picocms Pico, published on 10 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A host header injection vulnerability in picocms/Pico through 2.1.4 allows an unauthenticated remote attacker to control the origin of JavaScript and CSS assets loaded by the default theme. When base_url is unset (the default), Pico::getBaseUrl in lib/Pico.php builds the base URL from unvalidated Host, X-Forwarded-Host, X-Forwarded-Proto, and X-Forwarded-Port request headers.
Weakness: CWE-644
Which versions are affected by CVE-2026-72574?
How do I fix CVE-2026-72574?
No fix has been published for CVE-2026-72574 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-72574 being exploited?
There is no known exploitation of CVE-2026-72574 in the wild and no public exploit code.
Sources
Also known as GHSA-563g-2g6p-xmpf.