CVE-2026-59860
HIGHKiota: XML Doc-Comment Newline Breakout Code Injection
Title source: cnaDescription
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.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/microsoft/kiota/security/advisories/GHSA-3hrf-2gc2-mx32
X_Refsource_Misc x_refsource_misc
https://github.com/microsoft/kiota/pull/7831
X_Refsource_Misc x_refsource_misc
https://github.com/microsoft/kiota/commit/ebb632db90aa8e3c20949337d9faa2720d64ca44
X_Refsource_Misc x_refsource_misc
https://github.com/microsoft/kiota/releases/tag/v1.32.3
Scores
CVSS v4
8.7
EPSS
0.0102
EPSS Percentile
59.9%
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/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
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-94
Status
published
Products (3)
microsoft/kiota
< 1.32.3
nuget/Microsoft.OpenApi.Kiota
0 - 1.32.3NuGet
nuget/Microsoft.OpenApi.Kiota.Builder
0 - 1.32.3NuGet
Published
Jul 16, 2026
Tracked Since
Jul 16, 2026