CVE-2026-63184

{"id": "CVE-2026-63184", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "christianhelle", "product": "refitter", "versions": [{"status": "affected", "version": "< 2.1.1"}]}]}], "published": "2026-10-30T22:16:58.447", "references": [{"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": "security-advisories@github.com"}], "vulnStatus": "Received", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-829"}, {"lang": "en", "value": "CWE-918"}]}], "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."}], "lastModified": "2026-10-30T22:16:58.447", "sourceIdentifier": "security-advisories@github.com"}