picocms Pico - Host Header Injection Enables Script Source Hijacking (CVE-2026-72574) | HOL Guard CVE

Medium · CVSS 6.1CVE-2026-72574

picocms Pico - Host Header Injection Enables Script Source Hijacking

Answer in brief

CVE-2026-72574 records a Medium severity (CVSS 6.1) vulnerability in picocms Pico - Host Header Injection Enables Script Source Hijacking. The current sources do not mark it as known exploited. The current feed maps picocms/Pico (generic), picocms/Pico (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 10, 2026Updated Sep 3, 2026Source checked Sep 24, 2026First seen by HOL Aug 10, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.1
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 6.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps picocms/Pico (generic), picocms/Pico (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
picocms/Picogeneric	>=0 <2.1.4	2.1.4
picocms/Picogeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for picocms/Pico, picocms/Pico.
Review the reported fix. Update picocms/Pico to 2.1.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 10, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.