CVE-2026-59861GHSA-XG2H-5XR2-29JW
Kiota: Code Generation Literal Injection in Kiota Ruby Generator
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.31.1, 1.29.1, 1.32.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: yes
- Technical impact: total
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: total
- Record last updated
Affected versions
- microsoft kiota
From 1.30.0 · fixed in 1.31.1; fixed in 1.29.1
- Microsoft.OpenAPI.KiotaNuGet
From 1.30.0 · fixed in 1.32.0
- Microsoft.OpenAPI.Kiota.BuilderNuGet
From 1.30.0 · fixed in 1.32.0
- Microsoft.OpenApi.KiotaNuGet
fixed in 1.29.1
- Microsoft.OpenApi.Kiota.BuilderNuGet
fixed in 1.29.1