CVE-2026-55890
Medium
Description
Grav is a file-based Web platform. Prior to 2.0.0-rc.9, Grav's incomplete fix for stored XSS through the Markdown media attribute action (CVE-2026-42841) leaves the sibling MediaObjectTrait::style method reachable through the same Markdown excerpt-action pipeline, allowing an editor to save Markdown image style parameters that are written into the rendered img style attribute without sanitization. This issue is fixed in version 2.0.0-rc.9.
SeverityMedium
CVSS4.8
Exploit probability—
ProductGetgrav/grav
PublishedJul 10, 2026
First seenJul 10, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- getgrav/grav2.0.0-rc.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| getgrav/gravPackagist | v < 2.0.0-rc.9 | 2.0.0-rc.9 |
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