# CVE-2026-62387

## Summary

- **CVE ID:** CVE-2026-62387
- **Severity:** HIGH
- **CVSS Score:** 7.1 (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)
- **CWE:** CWE-942
- **Published:** Jul 17, 2026
- **Last Modified:** Jul 17, 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.

## Affected Products

- getgrav — grav (0)
- getgrav — grav (1.0.0-rc.16)

## References

- [CNA](https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2)
- [CNA](https://www.vulncheck.com/advisories/grav-rc-16-cors-misconfiguration-via-api-plugin)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.34%
- **EPSS Percentile:** 27.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._