CVE-2026-62387
Grav < 1.0.0-rc.16 CORS Misconfiguration via API Plugin
- State
- Published
- Severity
- 7.1 High
- Published
- Jul 17, 2026
- Updated
- Jul 17, 2026
- Reserved
- Jul 13, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.1 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N | VulnCheck |
Weaknesses
- CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains
Affected Products
| Product | Versions |
|---|---|
gravgetgrav |
|
References
- GitHub Security Advisory (GHSA-93px-98wh-6fj2)vendor-advisory
- VulnCheck Advisory: Grav < 1.0.0-rc.16 CORS Misconfiguration via API Pluginthird-party-advisory
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