{"id":"CVE-2026-63184","published":"2026-10-30T22:16:58.447","lastModified":"2026-10-30T22:16:58.447","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.","cvssScore":7.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","cwes":["CWE-829","CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b","tags":[]},{"url":"https://github.com/christianhelle/refitter/pull/1173","tags":[]},{"url":"https://github.com/christianhelle/refitter/releases/tag/2.1.1","tags":[]},{"url":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr","tags":[]},{"url":"https://github.com/user-attachments/files/29395269/reproduce.sh","tags":[]},{"url":"https://github.com/user-attachments/files/29395271/maintainer-report.txt","tags":[]},{"url":"https://github.com/user-attachments/files/29395272/advisory.md","tags":[]},{"url":"https://github.com/user-attachments/files/29395283/reproduce.sh","tags":[]},{"url":"https://github.com/user-attachments/files/29395284/maintainer-report.txt","tags":[]},{"url":"https://github.com/user-attachments/files/29395285/advisory.md","tags":[]},{"url":"https://github.com/user-attachments/files/29395286/listener.py","tags":[]},{"url":"https://github.com/user-attachments/files/29395288/make_spec.py","tags":[]}],"exploitRefs":[{"url":"https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b","tags":[]},{"url":"https://github.com/christianhelle/refitter/pull/1173","tags":[]},{"url":"https://github.com/christianhelle/refitter/releases/tag/2.1.1","tags":[]},{"url":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr","tags":[]},{"url":"https://github.com/user-attachments/files/29395269/reproduce.sh","tags":[]},{"url":"https://github.com/user-attachments/files/29395271/maintainer-report.txt","tags":[]},{"url":"https://github.com/user-attachments/files/29395272/advisory.md","tags":[]},{"url":"https://github.com/user-attachments/files/29395283/reproduce.sh","tags":[]},{"url":"https://github.com/user-attachments/files/29395284/maintainer-report.txt","tags":[]},{"url":"https://github.com/user-attachments/files/29395285/advisory.md","tags":[]},{"url":"https://github.com/user-attachments/files/29395286/listener.py","tags":[]},{"url":"https://github.com/user-attachments/files/29395288/make_spec.py","tags":[]}],"hasPoc":true,"ai":null}