Answer in brief
CVE-2026-105796 records a High severity (CVSS 8.8) vulnerability in Kiota: Code injection through doc-comment delimiter reformation in Kiota Java and PHP generators. The current sources do not mark it as known exploited. The current feed maps microsoft/kiota (generic), microsoft/Microsoft.OpenApi.Kiota (generic), microsoft/Microsoft.OpenApi.Kiota.Builder (generic), Microsoft.OpenApi.Kiota (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 8.8. 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/Microsoft.OpenApi.Kiota (generic), microsoft/Microsoft.OpenApi.Kiota.Builder (generic), Microsoft.OpenApi.Kiota (nuget) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| microsoft/kiotageneric | >=0.5.0 <1.35.0 | 1.35.0 |
| microsoft/Microsoft.OpenApi.Kiotageneric | >=0.5.0 <1.35.0 | 1.35.0 |
| microsoft/Microsoft.OpenApi.Kiota.Buildergeneric | >=0.5.0 <1.35.0 | 1.35.0 |
| Microsoft.OpenApi.Kiotanuget | >=0.5.0,<1.35.0 | 1.35.0 |
| Microsoft.OpenApi.Kiota.Buildernuget | >=0.5.0,<1.35.0 | 1.35.0 |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
Kiota is an OpenAPI based HTTP Client code generator. From 0.5.0 until 1.35.0, Kiota's Java and PHP documentation-comment sanitizers delete block-comment terminators rather than neutralizing them, allowing overlapping characters to reform a terminator and place attacker-controlled OpenAPI text outside a generated documentation comment. The Java sanitizer also removes non-ASCII characters after deleting terminators, which can create a new terminator during normalization. Exploitation requires a developer or build pipeline to generate source from the malicious description and then compile and load the Java output or load the PHP output, after which injected code executes in the consuming application or build environment context. The version range is based on the Java defect and does not assert that PHP generation existed in every affected release. This issue is fixed in version 1.35.0.
Quoted source text, attributed separately from HOL analysis.