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CVE-2026-45393

CRITICAL
9.8
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-45393
State
PUBLISHED
Assigner
Cribl
Reserved
2026-05-12 01:05 UTC
Published
2026-05-12 01:06 UTC
Last updated
2026-06-02 15:55 UTC
Primary CWE
CWE-276
CWE-276 Incorrect Default Permissions
Vendor / Product
Cribl / Cribl Edge
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
Cribl Cribl Edge Windows 0 < 4.17.1
Weakness (CWE)
CWESourceDescription
CWE-276 cna CWE-276 Incorrect Default Permissions
CWE-78 cna CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-20 adp CWE-20 Improper Input Validation
CVSS scores (3)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 adp CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.5 HIGH 4.0 cna 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
7.8 HIGH 3.1 cna CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References (2)
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