CVE-2026-45393 Local privilege escalation to SYSTEM in Cribl Edge for Windows
Local attackers can escalate privileges to SYSTEM by exploiting insecure permissions to forge tokens and execute OS commands.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45393?
CVE-2026-45393 is a high-severity vulnerability in Cribl Edge, published on 12 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-45393?
How do I fix CVE-2026-45393?
No fix has been published for CVE-2026-45393 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-45393 being exploited?
There is no known exploitation of CVE-2026-45393 in the wild and no public exploit code.
Sources
Also known as GHSA-2hpj-h2fj-2jg5.