{"id":"EUVD-2026-23550","revision":"1a58f471a80345a9af00ac40d6835b05","records":[{"revision":"1a58f471a80345a9af00ac40d6835b05","observedAt":"2026-10-30T06:00:24.892+00:00","statement":{"source":"euvd","id":"EUVD-2026-23550","aliases":["CVE-2026-40303","GHSA-cpf9-ph2j-ccr9"],"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":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":null}],"references":["https://github.com/openziti/zrok/security/advisories/GHSA-cpf9-ph2j-ccr9","https://github.com/openziti/zrok/releases/tag/v2.0.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-23550","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 17, 2026, 9:01:51 PM","dateUpdated":"Apr 20, 2026, 4:19:07 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-23550","identifiers":["EUVD-2026-23550","CVE-2026-40303","GHSA-cpf9-ph2j-ccr9"]},"retained":false,"historicalAffected":[]}],"coverage":[]}