CVE-2026-59860 PUBLISHED

Kiota: XML Doc-Comment Newline Breakout Code Injection

Assigner: GitHub_M
Reserved: 07.07.2026 Published: 16.07.2026 Updated: 16.07.2026

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.32.3, Kiota is affected by a code-generation injection vulnerability in the C# XML documentation-comment sink (the description, externalDocs label, and externalDocs link fields emitted as /// … comments). When text from an OpenAPI description is written into single-line XML doc comments without stripping newline and Unicode line-terminator characters, an attacker can break out of the /// comment line and inject additional code into generated C# clients. This issue is fixed in version 1.32.3.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Product Status

Vendor microsoft
Product kiota
Versions
  • Version < 1.32.3 is affected

References

Problem Types

  • CWE-94: Improper Control of Generation of Code ('Code Injection') CWE