Local privilege escalation to SYSTEM in Cribl Edge for Windows
Summary
| CVE | CVE-2026-45393 |
|---|---|
| State | PUBLISHED |
| Assigner | Cribl |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-12 02:16:13 UTC |
| Updated | 2026-06-02 17:16:33 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 8.5 HIGH from af879a92-7297-456a-bb0e-905ac6c64bdc
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.000690000 probability, percentile 0.213820000 (date 2026-06-04)
Problem Types: CWE-78 | CWE-276 | CWE-20 | CWE-276 CWE-276 Incorrect Default Permissions | CWE-78 CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | CWE-20 CWE-20 Improper Input Validation
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | af879a92-7297-456a-bb0e-905ac6c64bdc | Secondary | 8.5 | HIGH | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 8.5 | HIGH | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 3.1 | ADP | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | af879a92-7297-456a-bb0e-905ac6c64bdc | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v4.0 Breakdown
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cribl | Cribl Edge | affected 4.17.1 semver | Windows |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| trust.cribl.io/notifications | af879a92-7297-456a-bb0e-905ac6c64bdc | trust.cribl.io | |
| docs.cribl.io/edge/release-notes/release-v4171 | af879a92-7297-456a-bb0e-905ac6c64bdc | docs.cribl.io | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Abdulaziz M. Almetairy, Saudi Aramco (en)
Additional Advisory Data
Solutions
CNA: Upgrade Cribl Edge to v4.17.1 or higher. Upgrading fully resolves this vulnerability and no additional mitigation is required.