RCE in Jeromedevome Grr
CVE-2026-58256
GRR is a resource management and reservation application. Prior to the advisory-reported fixed version 4.5.0, an administrator can inject malicious PHP through LDAP connector configuration parameters such as `ldap_filter`, poisoning `/personnalisation/config_ldap.inc.php` and permitting remote code execution. The administrator must first successfully connect to an LDAP server, which can be attacker-controlled, and then submit malicious input on the subsequent connector settings page. The advisory reports this issue as fixed in version 4.5.0.
Vulnerability class: RCE (Remote Code Execution)
Published .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Jeromedevome Grr — versions < 4.5.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-58256?
- CVE-2026-58256 is a critical-severity vulnerability in Jeromedevome Grr, classified under Code Injection. CVSS score: 9.1/10. Published 2026-10-27.
- How severe is CVE-2026-58256?
- Critical severity. CVSS v3 base score is 9.1 out of 10.