Arbitrary Code Injection Affecting microsoft.openapi.kiota.builder package, versions [,1.31.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-DOTNET-MICROSOFTOPENAPIKIOTABUILDER-16115269
- published21 Apr 2026
- disclosed14 Apr 2026
- creditThanatos Tian
Introduced: 14 Apr 2026
NewCVE-2026-41134 (opens in a new tab)How to fix?
Upgrade Microsoft.OpenApi.Kiota.Builder to version 1.31.1 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection via the multiple writer sinks (such as serialization/deserialization keys, path/query parameter mappings, URL template metadata, enum/property metadata, and default value emission). An attacker can execute arbitrary code in generated client applications by supplying malicious values in an OpenAPI description that are injected into generated source code without proper escaping.