zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, endpoints.GetSessionCookie parses an attacker-supplied cookie chunk count and calls make([]string, count) with no upper bound before any token validation occurs. The function is reached on every request to an OAuth-protected proxy share, allowing an unauthenticated remote attacker to trigger gigabyte-scale heap allocations per request, leading to process-level OOM termination or repeated goroutine panics. Both publicProxy and dynamicProxy are affected. Version 2.0.1 patches the issue.
References
| Link | Resource |
|---|---|
| https://github.com/openziti/zrok/releases/tag/v2.0.1 | Release Notes |
| https://github.com/openziti/zrok/security/advisories/GHSA-cpf9-ph2j-ccr9 | Vendor Advisory |
Configurations
History
23 Apr 2026, 18:33
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Netfoundry
Netfoundry zrok |
|
| CPE | cpe:2.3:a:netfoundry:zrok:*:*:*:*:*:*:*:* | |
| References | () https://github.com/openziti/zrok/releases/tag/v2.0.1 - Release Notes | |
| References | () https://github.com/openziti/zrok/security/advisories/GHSA-cpf9-ph2j-ccr9 - Vendor Advisory |
17 Apr 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-17 21:16
Updated : 2026-04-23 18:33
NVD link : CVE-2026-40303
Mitre link : CVE-2026-40303
CVE.ORG link : CVE-2026-40303
JSON object : View
Products Affected
netfoundry
- zrok