How severe is CVE-2026-72574?

CVE-2026-72574 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-72574 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-72574?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-72574 published?

CVE-2026-72574 was published on 2026-08-10.

CVE-2026-72574

CVE-2026-72574 is a medium-severity vulnerability with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-644.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-644
Published: 2026-08-10
Last modified: 2026-08-10

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.

Frequently asked questions

What is CVE-2026-72574?: 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.
How severe is CVE-2026-72574?: CVE-2026-72574 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-72574 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-72574?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-72574 published?: CVE-2026-72574 was published on 2026-08-10.

References

Other CWE-644 vulnerabilities

CVE-2025-70948 — Critical (CVSS 9.3): A host header injection vulnerability in the mailer component of @perfood/couch-auth v0.26.0 allows attackers to obtain…
CVE-2026-26747 — Critical (CVSS 9.1): A Host Header Poisoning vulnerability exists in Monica 4.1.2 due to improper handling of the HTTP Host header in…
CVE-2026-26234 — High (CVSS 8.8): JUNG Smart Visu Server 1.1.1050 contains a request header manipulation vulnerability that allows unauthenticated…
CVE-2023-32465 — High (CVSS 8.8): Dell Power Protect Cyber Recovery, contains an Authentication Bypass vulnerability. An attacker could potentially…
CVE-2026-33805 — High (CVSS 8.6): @fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection…
CVE-2025-64484 — High (CVSS 8.5): OAuth2-Proxy is an open-source tool that can act as either a standalone reverse proxy or a middleware component…

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