CVE-2026-55890
Published:July 10, 2026
Updated:July 21, 2026
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.
Affected Packages
https://github.com/getgrav/grav.git (GITHUB):
Affected version(s) >=0.1.0 <2.0.0-rc.9Fix Suggestion:
Update to version 2.0.0-rc.9getgrav/grav (PHP):
Affected version(s) >=dev-add-claude-github-actions-1770170196497 <2.0.0-rc.9Fix Suggestion:
Update to version 2.0.0-rc.9getgrav/grav (PHP):
Affected version(s) >=dev-add-claude-github-actions-1770170196497 <2.0.0-rc.9Fix Suggestion:
Update to version 2.0.0-rc.9Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.19