{"affected":[{"product":"refitter","source":"CNA: GitHub_M","vendor":"christianhelle","versions":[{"status":"affected","version":"< 2.1.1"}]}],"cveId":"CVE-2026-63184","cwes":["CWE-829","CWE-918"],"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.","epss":{"date":"2026-11-02","percentile":0.35382,"score":0.00411},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr"}],"kev":null,"metrics":[{"score":7.1,"severity":"high","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","version":"3.1"}],"modifiedAt":1793630587417,"publishedAt":1793396946793,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/christianhelle/refitter/pull/1173"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/christianhelle/refitter/releases/tag/2.1.1"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395269/reproduce.sh"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395271/maintainer-report.txt"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395272/advisory.md"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395283/reproduce.sh"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395284/maintainer-report.txt"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395285/advisory.md"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395286/listener.py"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/user-attachments/files/29395288/make_spec.py"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr"}],"remediation":[],"revision":"6cdaded4f28c4dea93d3fd72c3716dc67dcd442b38ed9c3969a0d0a73f9e972b","sources":[{"modifiedAt":1793630587417,"name":"CNA: GitHub_M","retrievedAt":1793632147602,"url":"https://www.cve.org/CVERecord?id=CVE-2026-63184"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793632150911,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-63184"}],"ssvc":{"assessedAt":1793630563471,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Refitter: Unrestricted OpenAPI references permit build-host SSRF and file inclusion","updatedAt":1793632150911}