Report: Essential Guide: CVE-2026-40303 - zrok allows unauthenticated DoS via unbounded memory allocation in striped sessi...

Report: Essential Guide: CVE-2026-40303 - zrok allows unauthenticated DoS via unbounded memory allocation in striped sessi...

CVE ID :CVE-2026-40303 Published : April 17, 2026, 9:01 p.m. | 23 minutes ago 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. Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...

CVE Details

Published
April 17, 2026
Attack Vector: network