CVE-2026-8100 Path traversal in Chef360
An attacker can bypass access controls via URL-encoded paths to access restricted API endpoints, requiring specific deployment configurations.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8100?
CVE-2026-8100 is a high-severity path traversal vulnerability in Progress Chef Chef360, published on 18 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Impact
A security issue has been identified in Chef 360 that could allow unauthorized access to protected API endpoints under specific conditions. This issue is due to improper handling of URL-encoded paths during request processing. In certain scenarios, an authenticated request may bypass standard access controls gaining additional privileges, potentially allowing access to API endpoints that are intended to be restricted to higher-permissioned roles. The impact is limited to environments where the affected request patterns can be triggered and depends on specific deployment configuration and access controls in place. Resolution The issue has been addressed through product updates that improve request validation and enforce strict path normalization before authorization checks. Customers are advised to update to the latest available version containing the fix, version 1.7.1 or later.
Weakness: CWE-23
Which versions are affected by CVE-2026-8100?
How do I fix CVE-2026-8100?
No fix has been published for CVE-2026-8100 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-8100 being exploited?
There is no known exploitation of CVE-2026-8100 in the wild and no public exploit code.
Sources
Also known as GHSA-36qg-x8h8-59g2.