{"id":"CVE-2026-63344","aliases":[],"cve":{"records":[{"id":"CVE-2026-63344","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-07-16T14:14:24.385Z","published":"2026-10-30T22:15:27.846Z","modified":"2026-10-30T22:15:27.846Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-10-30T22:15:27.846Z"}],"references":[{"url":"https://github.com/christianhelle/refitter/security/advisories/GHSA-p32v-8v8j-j534","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/christianhelle/refitter/pull/1178","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/christianhelle/refitter/commit/ab4d8e439d6f0ee82ad49ee15323978d70fe5a67","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/christianhelle/refitter/releases/tag/2.1.2","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/user-attachments/files/29394848/reproduce.sh","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/user-attachments/files/29394851/maintainer-report.txt","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/user-attachments/files/29394853/make_spec.py","tags":["x_refsource_MISC"],"source":"GitHub_M"}],"weaknesses":[{"id":"CWE-94","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","source":"GitHub_M"},{"id":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","source":"GitHub_M"}],"applicability":[],"prioritization":[]},"title":"Refitter: C# source injection through OpenAPI content-type map keys","titleSource":"GitHub_M","descriptionSource":"GitHub_M","description":"Refitter is a tool for generating a C# REST API client using the Refit library. Prior to 2.1.2, content-type keys in the content maps of `requestBody/responses` are emitted verbatim into a Refit `[Headers(\"Accept: <ct>\", \"Content-Type: <ct>\")]` attribute string without escaping quotation marks. A crafted content-type key in an attacker-influenced OpenAPI description survives default validation without `--skip-validation`, breaks out of the attribute string and enclosing interface and namespace, and can introduce a top-level file class while leaving valid generated C#. A `[ModuleInitializer]` method in that class executes attacker code when the generated assembly is loaded at application startup, without requiring a call to the client. The behavior was verified with Refitter 2.0.0 and .NET 8. This issue is fixed in version 2.1.2.","score":8.6,"severity":"high","published":"2026-10-30T22:15:27.846Z","modified":"2026-10-30T22:15:27.846Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"christianhelle","name":"refitter","platforms":[],"versions":[{"version":"< 2.1.2","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-63344"}],"remediation":[],"references":["https://github.com/christianhelle/refitter/security/advisories/GHSA-p32v-8v8j-j534","https://github.com/christianhelle/refitter/pull/1178","https://github.com/christianhelle/refitter/commit/ab4d8e439d6f0ee82ad49ee15323978d70fe5a67","https://github.com/christianhelle/refitter/releases/tag/2.1.2","https://github.com/user-attachments/files/29394848/reproduce.sh","https://github.com/user-attachments/files/29394851/maintainer-report.txt","https://github.com/user-attachments/files/29394853/make_spec.py"],"sources":[{"name":"CVE","id":"CVE-2026-63344","modified":"2026-10-30T22:15:27.846Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-63344"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.6}],"sourceAffected":[],"observedAt":"2026-10-30T22:47:37.916Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T09:10:30.844Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-10-30T23:10:32.558Z","attemptedAt":"2026-10-30T23:10:32.558Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T23:10:32.387Z","attemptedAt":"2026-10-30T23:10:32.387Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-10-30T23:10:31.973Z","attemptedAt":"2026-10-30T23:10:31.973Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T23:10:31.766Z","attemptedAt":"2026-10-30T23:10:31.766Z"}],"evidence":[],"aiSummary":null}