CVE catalog
CVE-2026-41134
Kiota is an OpenAPI based HTTP Client code generator. Versions prior to 1.29.1 and 1.31.1 are affected by a code-generation literal injection vulnerability in multiple writer sinks (for example: seria
- Severity
- High · CVSS 7.3
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.42% · Oct 25, 2026
Kiota is an OpenAPI based HTTP Client code generator. Versions prior to 1.29.1 and 1.31.1 are affected by a code-generation literal injection vulnerability in multiple writer sinks (for example: serialization/deserialization keys, path/query parameter mappings, URL template metadata, enum/property metadata, and default value emission). When malicious values from an OpenAPI description are emitted into generated source without context-appropriate escaping, an attacker can break out of string literals and inject additional code into generated clients. This issue is only practically exploitable when the OpenAPI description used for generation is from an untrusted source, or a normally trusted OpenAPI description has been compromised/tampered with. Only generating from trusted, integrity-protected API descriptions significantly reduces the risk. To remediate the issue, upgrade Kiota to 1.29.1, 1.31.1, or later and regenerate/refresh existing generated clients as a precaution. Refreshing generated clients ensures previously generated vulnerable code is replaced with hardened output.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | kiota | Not reported | 1.31.1 | fixed |
| Cpe | kiota | Not reported | 1.31.1 | fixed |
| Nuget | Microsoft.OpenApi.Kiota | Not reported | 1.29.1 | fixed |
| Nuget | Microsoft.OpenApi.Kiota.Builder | Not reported | 1.29.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | kiota | cpe | Not reported | 1.31.1 | Not reported | Not reported | Not reported |
| Cpe | kiota | cpe | Not reported | 1.31.1 | Not reported | NVD-CVE-2026-41134 | Not reported |
| Nuget | Microsoft.OpenApi.Kiota | nuget | Not reported | 1.29.1 | Not reported | GHSA-2HX3-VP6R-MG3F | Not reported |
| Nuget | Microsoft.OpenApi.Kiota.Builder | nuget | Not reported | 1.29.1 | Not reported | GHSA-2HX3-VP6R-MG3F | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: