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.

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…

Vulnerability class: XSS (Cross-Site Scripting)

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)

CWE-79 — Cross-site Scripting

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.