CVE-2026-63344
— UNSCOREDpublic exploit availablePublished 2026-10-30 · Updated 2026-10-30
AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.
NVD 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.
Weaknesses
CWE-94, CWE-116
Public exploit & PoC references
- https://github.com/christianhelle/refitter/commit/ab4d8e439d6f0ee82ad49ee15323978d70fe5a67
- https://github.com/christianhelle/refitter/pull/1178
- https://github.com/christianhelle/refitter/releases/tag/2.1.2
- https://github.com/christianhelle/refitter/security/advisories/GHSA-p32v-8v8j-j534
- 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
All references
- https://github.com/christianhelle/refitter/commit/ab4d8e439d6f0ee82ad49ee15323978d70fe5a67
- https://github.com/christianhelle/refitter/pull/1178
- https://github.com/christianhelle/refitter/releases/tag/2.1.2
- https://github.com/christianhelle/refitter/security/advisories/GHSA-p32v-8v8j-j534
- 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
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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