CVE-2026-45393: CWE-276 Incorrect Default Permissions in Cribl Cribl Edge
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.
AI Analysis
Technical Summary
This vulnerability chain in Cribl Edge for Windows prior to version 4.17.1 arises from incorrect default permissions (CWE-276) on the authentication directory used by the Windows installer. The misconfiguration exposes a cryptographic secret critical for JWT signing and password-hash derivation. An authenticated local attacker can exploit this to forge administrative API tokens. These tokens enable the attacker to call a pipeline function that leads to an OS command injection (CWE-78) executed with SYSTEM-level privileges, effectively escalating local privileges to NT AUTHORITY\SYSTEM.
Potential Impact
An authenticated local user can escalate privileges to SYSTEM by exploiting exposed cryptographic secrets due to incorrect default permissions. This allows forging of administrative API tokens and execution of arbitrary OS commands with SYSTEM privileges, potentially compromising the entire system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to trusted users only and review permissions on the Windows installer's authentication directory to prevent unauthorized access to cryptographic secrets.
CVE-2026-45393: CWE-276 Incorrect Default Permissions in Cribl Cribl Edge
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.
CVSS v4.0
Score 8.5high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability chain in Cribl Edge for Windows prior to version 4.17.1 arises from incorrect default permissions (CWE-276) on the authentication directory used by the Windows installer. The misconfiguration exposes a cryptographic secret critical for JWT signing and password-hash derivation. An authenticated local attacker can exploit this to forge administrative API tokens. These tokens enable the attacker to call a pipeline function that leads to an OS command injection (CWE-78) executed with SYSTEM-level privileges, effectively escalating local privileges to NT AUTHORITY\SYSTEM.
Potential Impact
An authenticated local user can escalate privileges to SYSTEM by exploiting exposed cryptographic secrets due to incorrect default permissions. This allows forging of administrative API tokens and execution of arbitrary OS commands with SYSTEM privileges, potentially compromising the entire system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to trusted users only and review permissions on the Windows installer's authentication directory to prevent unauthorized access to cryptographic secrets.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Cribl
- Date Reserved
- 2026-05-12T01:05:53.672Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a02879ecbff5d86108b99f1
Added to database: 05/12/2026, 01:51:26 UTC
Last enriched: 06/02/2026, 20:00:03 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 137
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