CVE-2026-45393

Local privilege escalation to SYSTEM in Cribl Edge for Windows

State: Published
Severity: 8.5 High
Published: May 12, 2026
Updated: Jun 2, 2026
Reserved: May 12, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	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	Cribl
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Cribl
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-276 Incorrect Default Permissions
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-20 Improper Input Validation

Affected Products

Product	Versions
Cribl EdgeCribl	before 4.17.1Affected

References

Cribl Edge 4.17.1 Security Fixesrelease-notes
Cribl Trust Portalvendor-advisory

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