Vulnerability in Getgrav Grav
CVE-2026-58656
Grav API plugin before v1.0.0-rc.16 accepts JWT tokens via the ?token= URL query parameter and responds with Access-Control-Allow-Origin: *, allowing unauthenticated attackers to make fully authenticated cross-origin API requests from any malicious website. Attackers who obtain a leaked JWT token from access logs, proxy logs, browser history, or Referrer headers can create persistent backdoor super-admin accounts and exfiltrate sensitive configuration and user data.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Getgrav Grav — versions 0
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-hqm9-5xxw-4qxp (vendor-advisory)
- www.vulncheck.com/advisories/grav-api-plugin-cross-origin-admin-account-takeove… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58656?
- CVE-2026-58656 is a high-severity vulnerability in Getgrav Grav, classified under CWE-598. CVSS score: 7.5/10. Published 2026-07-08.
- How severe is CVE-2026-58656?
- High severity. CVSS v3 base score is 7.5 out of 10.