Grav: detectXss() misses an event-handler attribute after an unpaired quote in an unquoted attribute value, giving st...

Date Sep 17, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product Composer · getgrav/grav

CVE CVE-2026-75828

Critical vendor advisory CVE-2026-75828

Summary

Grav: detectXss() misses an event-handler attribute after an unpaired quote in an unquoted attribute value, giving stored XSS

Why it matters

GitHub has published a reviewed security advisory for getgrav/grav. Prioritize it with other application dependency updates, especially because EPSS places it in the 28% percentile.

Operator check

Check whether getgrav/grav is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 9.3. EPSS probability: 0.3%; percentile: 28%.

Sources

GitHub Advisory GHSA-vfmf-q6x9-cw96 NVD — CVE-2026-75828 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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