CVE-2026-42612: Grav Vulnerable to Publisher-Level Stored XSS via Unquoted Event Attributes

May 5, 2026 (updated May 13, 2026)

A stored Cross-Site Scripting (XSS) vulnerability in getgrav/grav allows publisher-level accounts to execute arbitrary JavaScript. The issue arises from a blacklist bypass in the detectXss() function when handling unquoted HTML event attributes.

References

github.com/advisories/GHSA-9695-8fr9-hw5q
github.com/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663
github.com/getgrav/grav/security/advisories/GHSA-9695-8fr9-hw5q
nvd.nist.gov/vuln/detail/CVE-2026-42612

Code Behaviors & Features

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