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.

CVSS v3.1

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

CVSS v3.1

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

EPSS

0.31% chance of exploitation in the next 30 days, 23th percentile

Published

2026-07-10

Proof-of-concept exploits (1)

• advisories/GHSA-pmf8-g7c8-7v54

References

• CVE Record
• NVD entry

Related

• CVE-2026-55885
• CVE-2026-5594
• CVE-2026-5587
• CVE-2026-5595
• CVE-2026-5586
• CVE-2026-55957