--- title: "CVE-2026-58256: GRR - Remote Code Execution" description: "GRR < 4.5.0 contains a remote code execution caused by malicious PHP injection via LDAP connector configuration parameters, letting administrators execute arbitrary code remotely, exploit requires successful LDAP connection and admin access." url: https://panop.io/threat-heartbeat/CVE-2026-58256/ --- # CVE-2026-58256 GRR - Remote Code Execution GRR < 4.5.0 contains a remote code execution caused by malicious PHP injection via LDAP connector configuration parameters, letting administrators execute arbitrary code remotely, exploit requires successful LDAP connection and admin access. CVSS base score 9.1 /10 Critical CISA KEV Not listed Public exploit None known Authentication Required EPSS 0.57% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-58256) ## Details Type Remote Code Execution Impact Remote Code Execution CVSS vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Published 27 October 2026 Updated 29 October 2026 Weakness [CWE-94](https://cwe.mitre.org/data/definitions/94.html) ## Vendor fix Upgrade to version 4.5.0 or later. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-58256](https://nvd.nist.gov/vuln/detail/CVE-2026-58256) - [https://github.com/JeromeDevome/GRR/commit/3ff9504ae557da1e8e208149acbf8c7f04de645f](https://github.com/JeromeDevome/GRR/commit/3ff9504ae557da1e8e208149acbf8c7f04de645f) - [https://github.com/JeromeDevome/GRR/security/advisories/GHSA-fp4f-xmw6-5jf8](https://github.com/JeromeDevome/GRR/security/advisories/GHSA-fp4f-xmw6-5jf8) - [https://github.com/JeromeDevome/GRR/tree/v4.5.0](https://github.com/JeromeDevome/GRR/tree/v4.5.0) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)