{"action":"Upgrade Microsoft.OpenApi to 2.7.5 (2.x) or 3.5.4 (3.x) or later.","affected":[{"fixed":"2.7.5","introduced":"2.0.0-preview.11"},{"fixed":"3.5.4","introduced":"3.0.0"}],"component":"Microsoft.OpenApi","cve_ids":["CVE-2026-49451"],"ecosystem":"NuGet","epss":0.00746,"exploited":false,"fixed_versions":["2.7.5","3.5.4"],"ghsa_id":"GHSA-v5pm-xwqc-g5wc","id":"tcs_01M5N911631H5TARZREHX2CYFQ","modified_at":"2026-07-06T13:15:09.903300965Z","published_at":"2026-06-30T15:56:24Z","references":["https://osv.dev/vulnerability/GHSA-v5pm-xwqc-g5wc","https://github.com/microsoft/OpenAPI.NET/security/advisories/GHSA-v5pm-xwqc-g5wc","https://nvd.nist.gov/vuln/detail/CVE-2026-49451","https://github.com/microsoft/OpenAPI.NET"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-v5pm-xwqc-g5wc","url":"https://osv.dev/vulnerability/GHSA-v5pm-xwqc-g5wc"}],"summary":"Microsoft.OpenAPI: Circular schema references may terminate OpenAPI parsing"}