XSS in Grav
CVE-2026-58657
Grav before 2.0.0 (affected through 2.0.0-rc.9 and the 2.0 branch) contains a stored CSS injection vulnerability in the Markdown image resize() media action. Prior media hardening rejects direct ?style= payloads and unsafe attribute() fall…
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
- Grav — versions 2.0.0-rc.9, 2.0.0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58657?
- CVE-2026-58657 is a medium-severity vulnerability in Grav, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-07-08.
- How severe is CVE-2026-58657?
- Medium severity. CVSS v3 base score is 4.8 out of 10.