{"id":"CVE-2026-59860","state":"PUBLISHED","title":"Kiota: XML Doc-Comment Newline Breakout Code Injection","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.","publishedAt":"2026-07-16T14:34:24.549Z","updatedAt":"2026-08-17T15:01:37.307Z","severity":{"score":8.7,"label":"High","version":"4.0","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","source":"GitHub_M"},"assigner":"GitHub_M","products":["microsoft kiota"],"affected":[{"vendor":"microsoft","product":"kiota","versions":[{"version":">= 1.30.0, < 1.31.1","status":"affected"},{"version":"< 1.29.1","status":"affected"}]}],"references":["https://github.com/microsoft/kiota/security/advisories/GHSA-3hrf-2gc2-mx32","https://github.com/microsoft/kiota/pull/7831","https://github.com/microsoft/kiota/commit/ebb632db90aa8e3c20949337d9faa2720d64ca44","https://github.com/microsoft/kiota/releases/tag/v1.32.3"],"weaknesses":["CWE-94"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59860.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59860","state":"PUBLISHED","datePublished":"2026-07-16T14:34:24.549Z","dateUpdated":"2026-08-17T15:01:37.307Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-07T15:41:53.606Z"},"containers":{"cna":{"title":"Kiota: XML Doc-Comment Newline Breakout Code Injection","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"microsoft","product":"kiota","versions":[{"version":">= 1.30.0, < 1.31.1","status":"affected"},{"version":"< 1.29.1","status":"affected"}]}],"references":[{"url":"https://github.com/microsoft/kiota/security/advisories/GHSA-3hrf-2gc2-mx32","name":"https://github.com/microsoft/kiota/security/advisories/GHSA-3hrf-2gc2-mx32","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/microsoft/kiota/pull/7831","name":"https://github.com/microsoft/kiota/pull/7831","tags":["x_refsource_MISC"]},{"url":"https://github.com/microsoft/kiota/commit/ebb632db90aa8e3c20949337d9faa2720d64ca44","name":"https://github.com/microsoft/kiota/commit/ebb632db90aa8e3c20949337d9faa2720d64ca44","tags":["x_refsource_MISC"]},{"url":"https://github.com/microsoft/kiota/releases/tag/v1.32.3","name":"https://github.com/microsoft/kiota/releases/tag/v1.32.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-17T15:01:37.307Z"},"source":{"advisory":"GHSA-3hrf-2gc2-mx32","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/microsoft/kiota/security/advisories/GHSA-3hrf-2gc2-mx32","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-59860","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-07-17T03:56:34.813340Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-29T19:26:44.335Z"}}]}}}