XSS in Getgrav Grav
CVE-2026-55890
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (23.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Getgrav Grav — versions < 2.0.0-rc.9
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-55890?
- CVE-2026-55890 is a medium-severity vulnerability in Getgrav Grav, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-07-10.
- How severe is CVE-2026-55890?
- Medium severity. CVSS v3 base score is 4.8 out of 10.