CVE-2026-59861: CWE-94: Improper Control of Generation of Code ('Code Injection') in microsoft kiota
Kiota is an OpenAPI based HTTP Client code generator. Prior to 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}, #$var, or #@var interpolation markers to inject arbitrary Ruby code into generated model classes. This issue is fixed in version 1.32.0.
AI Analysis
Technical Summary
Microsoft Kiota's Ruby generator prior to version 1.32.0 fails to properly escape interpolation markers when embedding OpenAPI schema-derived strings into Ruby double-quoted literals. This improper control of code generation (CWE-94) enables injection of arbitrary Ruby code via crafted OpenAPI default fields or property names containing interpolation sequences like #{expr}. The vulnerability is resolved in Kiota version 1.32.0.
Potential Impact
An attacker who can influence OpenAPI schema fields used by Kiota's Ruby generator can inject arbitrary Ruby code into generated model classes. This can lead to arbitrary code execution in environments where the generated code is used. The vulnerability does not affect confidentiality or integrity directly but results in high impact on availability due to potential code execution.
Mitigation Recommendations
A fix is available in Kiota version 1.32.0. Users should upgrade to version 1.32.0 or later to remediate this vulnerability. No other mitigation guidance is provided or required.
CVE-2026-59861: CWE-94: Improper Control of Generation of Code ('Code Injection') in microsoft kiota
Description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.32.0, Kiota's Ruby generator embedded OpenAPI default fields, property names, and other schema-derived strings through CodeMethodWriter.cs and SanitizeForQuotedLiteral() in Writers/StringExtensions.cs into Ruby double-quoted literals without escaping #, allowing attacker-controlled #{expr}, #$var, or #@var interpolation markers to inject arbitrary Ruby code into generated model classes. This issue is fixed in version 1.32.0.
CVSS v3.1
Score 7.5high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Microsoft Kiota's Ruby generator prior to version 1.32.0 fails to properly escape interpolation markers when embedding OpenAPI schema-derived strings into Ruby double-quoted literals. This improper control of code generation (CWE-94) enables injection of arbitrary Ruby code via crafted OpenAPI default fields or property names containing interpolation sequences like #{expr}. The vulnerability is resolved in Kiota version 1.32.0.
Potential Impact
An attacker who can influence OpenAPI schema fields used by Kiota's Ruby generator can inject arbitrary Ruby code into generated model classes. This can lead to arbitrary code execution in environments where the generated code is used. The vulnerability does not affect confidentiality or integrity directly but results in high impact on availability due to potential code execution.
Mitigation Recommendations
A fix is available in Kiota version 1.32.0. Users should upgrade to version 1.32.0 or later to remediate this vulnerability. No other mitigation guidance is provided or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-07T15:41:53.606Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a58ef3568715ace4330614c
Added to database: 07/16/2026, 14:48:21 UTC
Last enriched: 07/16/2026, 15:02:48 UTC
Last updated: 07/16/2026, 22:52:00 UTC
Views: 9
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.