CVE-2026-63184

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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"}}, "adp": [{"references": [{"url": "https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-02T14:42:43.471953Z", "id": "CVE-2026-63184", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-02T14:43:07.417Z"}}]}}

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This issue is fixed in version 2.1.1."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-829", "description": "CWE-829: Inclusion of Functionality from Untrusted Control Sphere"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-918", "description": "CWE-918: Server-Side Request Forgery (SSRF)"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-30T21:49:06.793Z"}}}, "cveMetadata": {"cveId": "CVE-2026-63184", "state": "PUBLISHED", "dateUpdated": "2026-11-02T14:43:07.417Z", "dateReserved": "2026-07-15T22:13:00.721Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-10-30T21:49:06.793Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"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": "2026-11-02T19:35:33.347", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63184", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-02T14:42:43.471953Z", "version": "2.0.3"}}]}, "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"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-829"}, {"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.1.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "refitter", "source": "cna", "vendor": "christianhelle"}, "product": "refitter", "vendor": "christianhelle"}], "created": "2026-10-31T00:00:27.657254+00:00", "updated": "2026-11-03T16:32:48.779773+00:00", "vendors": ["christianhelle", "christianhelle$PRODUCT$refitter"], "weaknesses": ["CWE-829", "CWE-918"]}