CVE-2026-41134

Kiota is an OpenAPI based HTTP Client code generator. Versions prior to 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 1.31.1 or later and regenerate/refresh existing generated clients as a precaution. Refreshing generated clients ensures previously generated vulnerable code is replaced with hardened output.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/microsoft/kiota/security/advisories/GHSA-2hx3-vp6r-mg3f	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:microsoft:kiota:*:*:*:*:*:*:*:*

History

14 May 2026, 21:23

Type	Values Removed	Values Added
First Time		Microsoft Microsoft kiota
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8
References	~~() https://github.com/microsoft/kiota/security/advisories/GHSA-2hx3-vp6r-mg3f -~~	() https://github.com/microsoft/kiota/security/advisories/GHSA-2hx3-vp6r-mg3f - Exploit, Vendor Advisory
CPE		cpe:2.3:a:microsoft:kiota::::::::

22 Apr 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-22 21:17

Updated : 2026-05-14 21:23

NVD link : CVE-2026-41134

Mitre link : CVE-2026-41134

CVE.ORG link : CVE-2026-41134

JSON object : View

Products Affected

microsoft

kiota

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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