CVE-2026-72574

Summary

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 Software

Weaknesses

• CWE-644: CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://picocms.org
• https://github.com/picocms/Pico
• https://github.com/picocms/Pico/blob/master/lib/Pico.php

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