Answer in brief
CVE-2026-59861 records a High severity (CVSS 7.5) vulnerability in Kiota: Code Generation Literal Injection in Kiota Ruby Generator. The current sources do not mark it as known exploited. The current feed maps microsoft/kiota (generic), Microsoft.OpenApi.Kiota (nuget), Microsoft.OpenAPI.Kiota (nuget), Microsoft.OpenApi.Kiota.Builder (nuget) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-59861 records a High severity (CVSS 7.5) vulnerability in Kiota: Code Generation Literal Injection in Kiota Ruby Generator. The current sources do not mark it as known exploited. The current feed maps microsoft/kiota (generic), Microsoft.OpenApi.Kiota (nuget), Microsoft.OpenAPI.Kiota (nuget), Microsoft.OpenApi.Kiota.Builder (nuget) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps microsoft/kiota (generic), Microsoft.OpenApi.Kiota (nuget), Microsoft.OpenAPI.Kiota (nuget), Microsoft.OpenApi.Kiota.Builder (nuget) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| microsoft/kiotageneric | >= 1.30.0, < 1.31.1 || < 1.29.1 | Not reported |
| Microsoft.OpenApi.Kiotanuget | <1.29.1 | 1.29.1 |
| Microsoft.OpenAPI.Kiotanuget | >=1.30.0,<1.32.0 | 1.32.0 |
| Microsoft.OpenApi.Kiota.Buildernuget | <1.29.1 | 1.29.1 |
| Microsoft.OpenAPI.Kiota.Buildernuget | >=1.30.0,<1.32.0 | 1.32.0 |
Published upstream
Jul 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 16, 2026
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.0, Kiota's Ruby generator embedded OpenAPI default fields, property names, and other schema-derived strings through CodeMethodWriter.cs and SanitizeForQuotedLiteral() in Writers/StringExtensions.cs into Ruby double-quoted literals without escaping #, allowing attacker-controlled #{expr}, #$var, or #@var interpolation markers to inject arbitrary Ruby code into generated model classes. This issue is fixed in version 1.29.1 and 1.32.0.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps microsoft/kiota (generic), Microsoft.OpenApi.Kiota (nuget), Microsoft.OpenAPI.Kiota (nuget), Microsoft.OpenApi.Kiota.Builder (nuget) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| microsoft/kiotageneric | >= 1.30.0, < 1.31.1 || < 1.29.1 | Not reported |
| Microsoft.OpenApi.Kiotanuget | <1.29.1 | 1.29.1 |
| Microsoft.OpenAPI.Kiotanuget | >=1.30.0,<1.32.0 | 1.32.0 |
| Microsoft.OpenApi.Kiota.Buildernuget | <1.29.1 | 1.29.1 |
| Microsoft.OpenAPI.Kiota.Buildernuget | >=1.30.0,<1.32.0 | 1.32.0 |
Published upstream
Jul 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 16, 2026
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.0, Kiota's Ruby generator embedded OpenAPI default fields, property names, and other schema-derived strings through CodeMethodWriter.cs and SanitizeForQuotedLiteral() in Writers/StringExtensions.cs into Ruby double-quoted literals without escaping #, allowing attacker-controlled #{expr}, #$var, or #@var interpolation markers to inject arbitrary Ruby code into generated model classes. This issue is fixed in version 1.29.1 and 1.32.0.
Quoted source text, attributed separately from HOL analysis.