{"api_version":"1","generated_at":"2026-11-01T19:22:01+00:00","cve":"CVE-2026-63184","urls":{"html":"https://cve.report/CVE-2026-63184","api":"https://cve.report/api/cve/CVE-2026-63184.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63184","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63184"},"summary":{"title":"Refitter: Unrestricted OpenAPI references permit build-host SSRF and file inclusion","description":"Refitter is a tool for generating a C# REST API client using the Refit library. Prior to 2.1.1, the `refitter` dotnet tool invokes `NJsonSchema` with unsafe defaults for `$ref` resolution when generating Refit interfaces and contracts from attacker-controlled or attacker-influenced OpenAPI descriptions. Remote `http(s)` references cause requests from the developer or CI host and inline untrusted remote schema content into generated output. Absolute local file paths and relative `../` traversal outside the input directory also resolve and inline local content, permitting arbitrary local-file disclosure. The demonstrated chain stops at server-side request forgery, remote file inclusion, and local file inclusion, not code execution: Refit sets the base URL at runtime, enum values use verbatim-string doubling, and string defaults are escaped. This issue is fixed in version 2.1.1.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-10-30 22:16:58","updated_at":"2026-10-30 22:16:58"},"problem_types":["CWE-829","CWE-918","CWE-829 CWE-829: Inclusion of Functionality from Untrusted Control Sphere","CWE-918 CWE-918: Server-Side Request Forgery (SSRF)"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","version":"3.1"}}],"references":[{"url":"https://github.com/user-attachments/files/29395272/advisory.md","name":"https://github.com/user-attachments/files/29395272/advisory.md","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/user-attachments/files/29395286/listener.py","name":"https://github.com/user-attachments/files/29395286/listener.py","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/christianhelle/refitter/pull/1173","name":"https://github.com/christianhelle/refitter/pull/1173","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/user-attachments/files/29395288/make_spec.py","name":"https://github.com/user-attachments/files/29395288/make_spec.py","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/christianhelle/refitter/releases/tag/2.1.1","name":"https://github.com/christianhelle/refitter/releases/tag/2.1.1","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/user-attachments/files/29395271/maintainer-report.txt","name":"https://github.com/user-attachments/files/29395271/maintainer-report.txt","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/user-attachments/files/29395285/advisory.md","name":"https://github.com/user-attachments/files/29395285/advisory.md","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr","name":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/user-attachments/files/29395284/maintainer-report.txt","name":"https://github.com/user-attachments/files/29395284/maintainer-report.txt","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/user-attachments/files/29395269/reproduce.sh","name":"https://github.com/user-attachments/files/29395269/reproduce.sh","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b","name":"https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/user-attachments/files/29395283/reproduce.sh","name":"https://github.com/user-attachments/files/29395283/reproduce.sh","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63184","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63184","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"christianhelle","product":"refitter","version":"affected < 2.1.1","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63184","cve":"CVE-2026-63184","epss":"0.004110000","percentile":"0.354030000","score_date":"2026-10-31","updated_at":"2026-11-01 00:01:50"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"refitter","vendor":"christianhelle","versions":[{"status":"affected","version":"< 2.1.1"}]}],"descriptions":[{"lang":"en","value":"Refitter is a tool for generating a C# REST API client using the Refit library. Prior to 2.1.1, the `refitter` dotnet tool invokes `NJsonSchema` with unsafe defaults for `$ref` resolution when generating Refit interfaces and contracts from attacker-controlled or attacker-influenced OpenAPI descriptions. Remote `http(s)` references cause requests from the developer or CI host and inline untrusted remote schema content into generated output. Absolute local file paths and relative `../` traversal outside the input directory also resolve and inline local content, permitting arbitrary local-file disclosure. The demonstrated chain stops at server-side request forgery, remote file inclusion, and local file inclusion, not code execution: Refit sets the base URL at runtime, enum values use verbatim-string doubling, and string defaults are escaped. This issue is fixed in version 2.1.1."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-829","description":"CWE-829: Inclusion of Functionality from Untrusted Control Sphere","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-30T21:49:06.793Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr"},{"name":"https://github.com/christianhelle/refitter/pull/1173","tags":["x_refsource_MISC"],"url":"https://github.com/christianhelle/refitter/pull/1173"},{"name":"https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b","tags":["x_refsource_MISC"],"url":"https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b"},{"name":"https://github.com/christianhelle/refitter/releases/tag/2.1.1","tags":["x_refsource_MISC"],"url":"https://github.com/christianhelle/refitter/releases/tag/2.1.1"},{"name":"https://github.com/user-attachments/files/29395269/reproduce.sh","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395269/reproduce.sh"},{"name":"https://github.com/user-attachments/files/29395271/maintainer-report.txt","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395271/maintainer-report.txt"},{"name":"https://github.com/user-attachments/files/29395272/advisory.md","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395272/advisory.md"},{"name":"https://github.com/user-attachments/files/29395283/reproduce.sh","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395283/reproduce.sh"},{"name":"https://github.com/user-attachments/files/29395284/maintainer-report.txt","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395284/maintainer-report.txt"},{"name":"https://github.com/user-attachments/files/29395285/advisory.md","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395285/advisory.md"},{"name":"https://github.com/user-attachments/files/29395286/listener.py","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395286/listener.py"},{"name":"https://github.com/user-attachments/files/29395288/make_spec.py","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395288/make_spec.py"}],"source":{"advisory":"GHSA-x6w4-f264-3vvr","discovery":"UNKNOWN"},"title":"Refitter: Unrestricted OpenAPI references permit build-host SSRF and file inclusion"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-63184","datePublished":"2026-10-30T21:49:06.793Z","dateReserved":"2026-07-15T22:13:00.721Z","dateUpdated":"2026-10-30T21:49:06.793Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-30 22:16:58","lastModifiedDate":"2026-10-30 22:16:58","problem_types":["CWE-829","CWE-918","CWE-829 CWE-829: Inclusion of Functionality from Untrusted Control Sphere","CWE-918 CWE-918: Server-Side Request Forgery (SSRF)"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":4.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63184","Ordinal":"1","Title":"Refitter: Unrestricted OpenAPI references permit build-host SSRF","CVE":"CVE-2026-63184","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63184","Ordinal":"1","NoteData":"Refitter is a tool for generating a C# REST API client using the Refit library. Prior to 2.1.1, the `refitter` dotnet tool invokes `NJsonSchema` with unsafe defaults for `$ref` resolution when generating Refit interfaces and contracts from attacker-controlled or attacker-influenced OpenAPI descriptions. Remote `http(s)` references cause requests from the developer or CI host and inline untrusted remote schema content into generated output. Absolute local file paths and relative `../` traversal outside the input directory also resolve and inline local content, permitting arbitrary local-file disclosure. The demonstrated chain stops at server-side request forgery, remote file inclusion, and local file inclusion, not code execution: Refit sets the base URL at runtime, enum values use verbatim-string doubling, and string defaults are escaped. This issue is fixed in version 2.1.1.","Type":"Description","Title":"Refitter: Unrestricted OpenAPI references permit build-host SSRF"}]}}}