Medium 4.8Published Jul 10, 2026

CVE-2026-55890Grav: Stored CSS injection via Markdown image ?style=… reaches MediaObjectTrait::style()

Updated under an hour ago (Oct 26, 2026, 12:00 PM ET)

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It affects getgrav grav. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for getgrav grav

Exploited in the last 30 days

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.

CVSS: 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

getgrav grav getgrav:grav (from the name)	before 2.0.0-rc.9	CNA record

References

https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54x-refsource-confirm
https://github.com/getgrav/grav/commit/24fd6cbc438e12310b126d1176e7d7601203a6f2x-refsource-misc
https://github.com/getgrav/grav/releases/tag/2.0.0-rc.9x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.