# CVE-2026-58656

## Summary

- **CVE ID:** CVE-2026-58656
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-598
- **Published:** Jul 8, 2026
- **Last Modified:** Jul 8, 2026

## Description

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.

## Affected Products

- getgrav — grav (0)

## References

- [CNA](https://github.com/getgrav/grav/security/advisories/GHSA-hqm9-5xxw-4qxp)
- [CNA](https://www.vulncheck.com/advisories/grav-api-plugin-cross-origin-admin-account-takeover-via-cors-wildcard-and-jwt-query-parameter)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 37.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._