What is CVE-2026-74908?

CVE-2026-74908 is a medium-severity vulnerability in Getgrav Grav, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2026-08-18.

How severe is CVE-2026-74908?

Medium severity. CVSS v3 base score is 4.6 out of 10.

XSS in Getgrav Grav

CVE-2026-74908

Grav plugin-api before 1.0.15 contains a script injection vulnerability where the SVG sanitizer only checks for the exact extension 'svg', allowing .svgz and .xhtml files to bypass sanitization and be stored unsanitized. Attackers with api.media.write permission can upload files containing executable script payloads that execute in the site origin when accessed by administrators or visitors.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

Affected products

Getgrav Grav

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-74908?: CVE-2026-74908 is a medium-severity vulnerability in Getgrav Grav, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2026-08-18.
How severe is CVE-2026-74908?: Medium severity. CVSS v3 base score is 4.6 out of 10.