CVE-2026-40303
Description
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.
How to fix
- netfoundry zrok2.0.1 or later
- github.com/openziti/zrok/v22.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| netfoundry zrok | v < 2.0.1 | 2.0.1 |
| github.com/openziti/zrokGo | v ≤ 1.1.11, No range specified | — |
| github.com/openziti/zrok/v2Go | v < 2.0.1 | 2.0.1 |
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Attack Surface Management
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