Vulnerability in Getgrav Grav
CVE-2026-62387
The Grav API plugin (getgrav/grav-plugin-api) before 1.0.0-rc.16 shipped Access-Control-Allow-Origin: * as its default CORS configuration on all responses, including authenticated endpoints and preflight (OPTIONS) responses. Because the plugin accepts credentials via the Authorization and X-API-Token headers (set programmatically by JavaScript rather than via cookies), an attacker who obtains a valid access token (e.g., via log leakage, Referer headers, browser history, or network capture) can issue fully authenticated cross-origin requests from any malicious website to read sensitive data and perform write operations as the token's user. Fixed in 1.0.0-rc.16.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (26.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Getgrav Grav — versions 0, 1.0.0-rc.16
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2 (vendor-advisory)
- www.vulncheck.com/advisories/grav-rc-16-cors-misconfiguration-via-api-plugin (third-party-advisory)
Frequently asked questions
- What is CVE-2026-62387?
- CVE-2026-62387 is a high-severity vulnerability in Getgrav Grav, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 7.1/10. Published 2026-07-17.
- How severe is CVE-2026-62387?
- High severity. CVSS v3 base score is 7.1 out of 10.