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9.1
CVE-2026-58256: GRR allows admin to run malicious code via LDAP settings
CVE-2026-58256 · published today
Summary
The GRR reservation system lets administrators set up an LDAP connection. If an attacker controls the LDAP server and the admin enters crafted settings, PHP code can be injected and executed on the server. Updating to version 4.5.0 or later removes this risk.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| jeromedevome | grr | < 4.5.0 |
Original advisory text
GRR vulnerable to Remote Code Execution Via PHP Code Injection
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.
References
- https://github.com/JeromeDevome/GRR/commit/3ff9504ae557da1e8e208149acbf8c7f04de6... x_refsource_MISC
- https://github.com/JeromeDevome/GRR/security/advisories/GHSA-fp4f-xmw6-5jf8 x_refsource_CONFIRM
- https://github.com/JeromeDevome/GRR/tree/v4.5.0 x_refsource_MISC
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker full control (estimated)
Type
CWE-94Code Injection
Timeline
Published27 Oct 2026
Updated27 Oct 2026
First seen27 Oct 2026
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