CVE-2026-45393 Details
Description
A vulnerability chain in Cribl Edge for Windows before 4.17.1 allows a local authenticated user to escalate privileges to NT AUTHORITY\SYSTEM. Incorrect default permissions on the Windows installer's authentication directory (CWE-276) expose a cryptographic secret used for JWT signing and password-hash derivation, enabling forgery of administrative API tokens. The forged token can then be used to invoke a pipeline function that reaches an OS command sink (CWE-78) running in the SYSTEM context.
A critical security vulnerability has been identified in Cribl Edge versions prior to 4.17.1 for both Linux and Windows. This vulnerability requires immediate attention, as it could potentially be exploited to compromise the application's security.
Users are strongly encouraged to upgrade to Cribl Edge version 4.17.1. For on-premises deployments, the updated version will be available starting April 22, 2026. Hybrid users should wait until their cloud Leader Node has been upgraded before updating Edge Nodes to avoid unexpected behavior.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 12, 2026CISA-ADP
Assessed May 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://docs.cribl.io/edge/release-notes/release-v4171#security-fixes | Cribl | Release NotesVendor |
| https://trust.cribl.io/notifications | Cribl | AdvisoryBundleVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | CISA-ADP |
| CWE-276 | Incorrect Default Permissions | Cribl |
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | Cribl |
Affected Products
| Product | Versions |
|---|---|
| Cribl Edge | All versions |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | Cribl |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 2, 2026 | CVE Modified | Cribl |
| May 15, 2026 | CVE Modified | CISA-ADP |
| May 15, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | New CVE Received | Cribl |