{"id":"CVE-2026-40303","revision":"fea1df8451d3473eb4a38e8c4e8b9271","records":[{"revision":"fea1df8451d3473eb4a38e8c4e8b9271","observedAt":"2026-10-27T10:09:56.341+00:00","statement":{"source":"nvd","id":"CVE-2026-40303","aliases":[],"title":"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 …","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.","state":0,"publishedAt":"2026-04-17T21:16:35.14+00:00","modifiedAt":"2026-10-26T22:10:00.163+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/openziti/zrok/releases/tag/v2.0.1","https://github.com/openziti/zrok/security/advisories/GHSA-cpf9-ph2j-ccr9"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-40303","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-400","CWE-789"],"productCriteria":["cpe:2.3:a:netfoundry:zrok:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-04-17T21:16:35.140","lastModified":"2026-10-26T22:10:00.163"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-40303","identifiers":["CVE-2026-40303"]},"retained":false,"historicalAffected":[]}],"coverage":[]}