CVE-2026-63184 (GCVE-0-2026-63184)

Vulnerability from cvelistv5 – Published: 2026-10-30 21:49 – Updated: 2026-11-02 14:43
VLAI
Title
Refitter: Unrestricted OpenAPI references permit build-host SSRF and file inclusion
Summary
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.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 14:42 UTC
CWE
  • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8016 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
christianhelle refitter Affected: < 2.1.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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}



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