High severity · published Jul 16, 2026
CVE-2026-59860
Kiota: XML Doc-Comment Newline Breakout Code Injection
8.7
CVSS
1.4%
EPSS
No
On KEV
Description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 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 1.29.1 and 1.32.3.
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
kiota · microsoft
>= 1.30.0, < 1.31.1; < 1.29.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59860
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59860
github.com
https://github.com/microsoft/kiota/commit/ebb632db90aa8e3c20949337d9faa2720d64ca44
github.com
https://github.com/microsoft/kiota/pull/7831
github.com
https://github.com/microsoft/kiota/releases/tag/v1.32.3
github.com
https://github.com/microsoft/kiota/security/advisories/GHSA-3hrf-2gc2-mx32
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