{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63184", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-15T22:13:00.721Z", "datePublished": "2026-10-30T21:49:06.793Z", "dateUpdated": "2026-10-30T21:49:06.793Z"}, "containers": {"cna": {"title": "Refitter: Unrestricted OpenAPI references permit build-host SSRF and file inclusion", "problemTypes": [{"descriptions": [{"cweId": "CWE-829", "lang": "en", "description": "CWE-829: Inclusion of Functionality from Untrusted Control Sphere", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "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"}}], "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"}], "affected": [{"vendor": "christianhelle", "product": "refitter", "versions": [{"version": "< 2.1.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-30T21:49:06.793Z"}, "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."}], "source": {"advisory": "GHSA-x6w4-f264-3vvr", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "refitter", "vendor": "christianhelle", "versions": [{"status": "affected", "version": "< 2.1.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-63184", "lastModified": "2026-10-30T22:16:58.447", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-30T22:16:58.447", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b"}, {"source": "security-advisories@github.com", "url": "https://github.com/christianhelle/refitter/pull/1173"}, {"source": "security-advisories@github.com", "url": "https://github.com/christianhelle/refitter/releases/tag/2.1.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr"}, {"source": "security-advisories@github.com", "url": "https://github.com/user-attachments/files/29395269/reproduce.sh"}, {"source": "security-advisories@github.com", "url": "https://github.com/user-attachments/files/29395271/maintainer-report.txt"}, {"source": "security-advisories@github.com", "url": "https://github.com/user-attachments/files/29395272/advisory.md"}, {"source": "security-advisories@github.com", "url": "https://github.com/user-attachments/files/29395283/reproduce.sh"}, {"source": "security-advisories@github.com", "url": "https://github.com/user-attachments/files/29395284/maintainer-report.txt"}, {"source": "security-advisories@github.com", "url": "https://github.com/user-attachments/files/29395285/advisory.md"}, {"source": "security-advisories@github.com", "url": "https://github.com/user-attachments/files/29395286/listener.py"}, {"source": "security-advisories@github.com", "url": "https://github.com/user-attachments/files/29395288/make_spec.py"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-829"}, {"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-10-31T00:00:27.657254+00:00", "updated": "2026-10-31T00:00:27.657263+00:00", "vendors": [], "weaknesses": ["CWE-829", "CWE-918"]}