{"id":"EUVD-2026-39809","revision":"0fe7a438d74b45068dce56add631521b","records":[{"revision":"0fe7a438d74b45068dce56add631521b","observedAt":"2026-11-03T09:59:33.636+00:00","statement":{"source":"euvd","id":"EUVD-2026-39809","aliases":["CVE-2026-48529","GHSA-pjp5-fpmr-3349"],"title":"GitHub MCP Server is GitHub's official MCP Server. From 0.22.0 until 1.1.2, when running in HTTP mode with --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton initialized with the first authenticated us…","description":"GitHub MCP Server is GitHub's official MCP Server. From 0.22.0 until 1.1.2, when running in HTTP mode with --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton initialized with the first authenticated user's GraphQL client. All subsequent requests from different users share this singleton and their lockdown-related GraphQL queries are executed using the first user's credentials. The singleton is never updated to reflect later users' tokens. This vulnerability is fixed in 1.1.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L","score":6,"severity":null}],"references":["https://github.com/github/github-mcp-server/security/advisories/GHSA-pjp5-fpmr-3349"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39809","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 26, 2026, 4:33:32 PM","dateUpdated":"Jun 27, 2026, 2:43:34 AM"},"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-2026-39809","identifiers":["EUVD-2026-39809","CVE-2026-48529","GHSA-pjp5-fpmr-3349"]},"retained":false,"historicalAffected":[]}],"coverage":[]}