CVE-2026-40303

· NIST NVD ↗

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.

HIGH
CVSS severity
7.5
CVSS base score
2026-04-17
Published

CWE codes

CWE-400CWE-789

Affected products

netfoundry:zrok

Sources