CVE-2026-55890

Published: Jul 10, 2026Modified: Jul 10, 2026Deferred

4.8

Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Exploitability: 1.7 / Impact: 2.7

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (4)

https://github.com/getgrav/grav/commit/24fd6cbc438e12310b126d1176e7d7601203a6f2

Source: security-advisories@github.com

https://github.com/getgrav/grav/releases/tag/2.0.0-rc.9

Source: security-advisories@github.com

https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54

Source: security-advisories@github.com

https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.