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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…

Medium CVSS 6.1
CVECVE-2026-72574
First seen2026-08-10 12:16 UTC
Disclosed2026-08-10 11:17 UTC
Last updated2026-08-10 12:16 UTC
Channel statusauto

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. The resulting URL propagates to theme_url, assets_url, and plugins_url, causing script and stylesheet tags to load res…

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Lint boundary warnings (1)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://picocms.org

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD