CVE-2026-45393

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://docs.cribl.io/edge/release-notes/release-v4171#security-fixes
https://trust.cribl.io/notifications

Configurations

No configuration.

History

02 Jun 2026, 17:16

Type	Values Removed	Values Added
Summary	~~(en) Reserved. Details will be published at disclosure.~~	(en) 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.
CVSS	v2 : ~~unknown~~ v3 : ~~9.8~~	v2 : unknown v3 : 7.8
CWE		CWE-276 CWE-78

15 May 2026, 21:16

Type	Values Removed	Values Added
CWE		CWE-20

15 May 2026, 12:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8

12 May 2026, 02:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-12 02:16

Updated : 2026-06-02 17:16

NVD link : CVE-2026-45393

Mitre link : CVE-2026-45393

CVE.ORG link : CVE-2026-45393

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-276

Incorrect Default Permissions

CWE-20

Improper Input Validation

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