Vulnerability · Published Aug 10, 2026 · Assigned by TuranSec

CVE-2026-72574picocms Pico - Host Header Injection Enables Script Source Hijacking

Medium 6.1

In plain English

A medium-severity security flaw in Pico from picocms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.4%top 63.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
picocms	Pico	0 – through 2.1.4

Weakness: CWE-644 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Vendor third-party-advisory
Product third-party-advisory
Vulnerable File technical-description