{"id":"CVE-2026-59864","aliases":["EUVD-2026-44935","GHSA-4jwf-m4wg-8p66"],"status":"published","title":"Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions","description":"Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin manifests without path validation, allowing ../, absolute, rooted, UNC, Windows drive, or URI paths in response_semantics.static_template.file to cause path traversal or out-of-package file inclusion when the generated plugin was deployed. This issue is fixed in version 1.29.1 and 1.32.5.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01331,"percentile":0.71466,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22","CWE-829"],"published":"2026-07-16T14:45:36Z","modified":"2026-11-07T02:48:39Z","fixes":[{"ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota","fixed_in":["1.32.5","1.29.1"],"sources":["ghsa","osv"]},{"ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota.Builder","fixed_in":["1.32.5","1.29.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.30.0"},{"fixed":"1.32.5"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota.Builder","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.30.0"},{"fixed":"1.32.5"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29.1"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota.Builder","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29.1"}]}]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.30.0"},{"fixed":"1.32.5"}]}],"versions":["1.30.0","1.31.0","1.31.1","1.32.0","1.32.1","1.32.2","1.32.3","1.32.4"]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota.Builder","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.30.0"},{"fixed":"1.32.5"}]}]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29.1"}]}],"versions":["0.1.0-preview","0.1.1-preview","0.1.2-preview","0.1.3-preview","0.10.0-preview","0.11.0-preview","0.11.1-preview","0.2.0-preview","0.2.1-preview","0.3.0-preview","0.4.0-preview","0.5.0-preview","0.5.1-preview","0.6.0-preview","0.7.1-preview","0.8.3-preview","0.9.0-preview","1.0.0","1.0.1","1.1.0","1.1.1","1.1.2","1.1.3","1.10.0","1.10.1","1.11.0","1.11.1","1.12.0","1.13.0","1.14.0","1.15.0","1.16.0","1.17.0","1.18.0","1.19.0","1.19.1","1.2.0","1.2.1","1.20.0","1.21.0","1.22.0","1.22.1","1.22.2","1.22.3","1.23.0","1.24.0","1.24.1","1.24.2","1.24.3","1.25.1","1.26.0","1.26.1","1.27.0","1.28.0","1.29.0","1.3.0","1.4.0","1.5.0","1.5.1","1.6.1","1.7.0","1.8.0","1.8.1","1.8.2","1.9.0","1.9.1"]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.OpenApi.Kiota.Builder","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29.1"}]}],"versions":["0.2.0-preview","0.3.0-preview","0.4.0-preview","0.5.0-preview","0.5.1-preview","0.6.0-preview","0.7.1-preview","1.0.0","1.0.1","1.1.0","1.1.1","1.1.2","1.1.3","1.10.0","1.10.1","1.11.0","1.11.1","1.12.0","1.13.0","1.14.0","1.15.0","1.16.0","1.17.0","1.18.0","1.19.0","1.19.1","1.2.0","1.2.1","1.20.0","1.21.0","1.22.0","1.22.1","1.22.2","1.22.3","1.23.0","1.3.0","1.4.0","1.5.0","1.5.1","1.6.1","1.7.0","1.8.0","1.8.1","1.8.2","1.9.0","1.9.1"]}],"products":[{"vendor":"microsoft","product":"kiota"}],"references":[{"url":"https://github.com/microsoft/kiota/security/advisories/GHSA-4jwf-m4wg-8p66","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/microsoft/kiota/pull/7892","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e79","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/microsoft/kiota/releases/tag/v1.32.5","tags":["x_refsource_MISC","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59864","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4jwf-m4wg-8p66"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59864.json","tags":["advisory"]},{"url":"https://github.com/microsoft/kiota","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-59864","title":"Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions","description":"Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin manifests without path validation, allowing ../, absolute, rooted, UNC, Windows drive, or URI paths in response_semantics.static_template.file to cause path traversal or out-of-package file inclusion when the generated plugin was deployed. This issue is fixed in version 1.29.1 and 1.32.5.","status":"published","published":"2026-07-16T14:45:36.247Z","modified":"2026-08-17T15:02:52.269Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"}],"cwes":["CWE-22","CWE-829"],"updated_at":"2026-11-02T14:19:58.944663Z"}],"euvd":[{"id":"EUVD-2026-44935","description":"Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin manifests without path validation, allowing ../, absolute, rooted, UNC, Windows drive, or URI paths in response_semantics.static_template.file to cause path traversal or out-of-package file inclusion when the generated plugin was deployed. This issue is fixed in version 1.29.1 and 1.32.5.","status":"published","published":"2026-07-16T14:45:36Z","modified":"2026-08-17T15:02:52Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T18:01:49.335011Z"}],"ghsa":[{"id":"GHSA-4jwf-m4wg-8p66","title":"Microsoft Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions","description":"### Summary\n\n`kiota plugin add` / `kiota plugin generate` (with `-t APIPlugin`) emits an attacker-controlled `static_template.file` path from the AI-plugin extensions (`x-ai-adaptive-card`, `x-ai-capabilities`) **verbatim**, with no path validation, into the generated Microsoft 365 Copilot / Teams plugin manifest (`\u003cname\u003e-apiplugin.json`). An attacker-controlled or compromised OpenAPI description can therefore embed a `../` / absolute path into the manifest's `response_semantics.static_template.file`, yielding a **path traversal (CWE-22)** / out-of-package file inclusion (CWE-829) that is resolved by the AI host when the generated plugin is deployed.\n\nConfirmed on Kiota **1.32.4** (`KIOTA_CONFIG_PREVIEW=true`, the self-contained `linux-x64` release binary).\n\n### Details\n\nBoth extension paths write the `static_template.file` reference straight into the manifest without sanitization — `PluginsGenerationService.GetResponseSemanticsFromAdaptiveCardExtension` mints `static_template = {\"file\": \u003cFile\u003e}`, and the `x-ai-capabilities` path copies the `static_template` object through:\n\n```\n# spec                                                  -\u003e generated manifest (functions[].capabilities.response_semantics)\nx-ai-adaptive-card: {title: T, data_path: $.x,\n   file: \"../../../../../../etc/passwd\"}                -\u003e static_template.file = \"../../../../../../etc/passwd\"   (CWE-22)\nx-ai-capabilities.response_semantics.static_template:\n   {file: \"../../../../../../etc/passwd\"}               -\u003e static_template.file = \"../../../../../../etc/passwd\"   (CWE-22)\n```\n\n(`x-ai-adaptive-card.file` only reaches the manifest when `title` is set, so `GetResponseSemanticsFromAdaptiveCardExtension` fires; otherwise kiota writes its own template card instead.)\n\n### Impact\n\n**This is not local code execution on the build host.** The injected path is written into the generated plugin manifest and realized **downstream**, when the plugin is packaged and sideloaded / deployed to an AI host (Microsoft 365 Copilot / Teams) that resolves `static_template.file` relative to the plugin package (out-of-package file reference via `../`). Kiota is the propagation point: it fails to reject `../` and absolute paths in this provider-supplied field before writing it into the manifest.\n\n### Patches\n\nFixed in **1.29.1 and 1.32.5** (https://github.com/microsoft/kiota/pull/7892). `static_template.file` from both `x-ai-adaptive-card` and `x-ai-capabilities` is validated as a relative path confined to the plugin output package: absolute URIs, rooted/UNC paths, Windows drive paths, and `..` traversal segments are rejected, and unsafe references are dropped with a warning. Regression tests cover `..`, absolute paths, and URI values.\n\n### Remediation\n\nUpgrade to Kiota **1.29.1, 1.32.5** or later and regenerate affected plugins.","status":"published","published":"2026-07-24T15:58:31Z","modified":"2026-08-17T14:54:43Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-22","CWE-829"],"updated_at":"2026-11-02T14:41:01.23108Z"}],"nvd":[{"id":"CVE-2026-59864","description":"Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin manifests without path validation, allowing ../, absolute, rooted, UNC, Windows drive, or URI paths in response_semantics.static_template.file to cause path traversal or out-of-package file inclusion when the generated plugin was deployed. This issue is fixed in version 1.29.1 and 1.32.5.","status":"published","published":"2026-07-16T16:19:15.24Z","modified":"2026-10-24T20:10:00.137Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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","level":"critical","assessor":"secondary"}],"cwes":["CWE-22","CWE-829"],"updated_at":"2026-11-02T14:12:30.250437Z"}],"osv":[{"id":"CVE-2026-59864","title":"Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions","description":"Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin manifests without path validation, allowing ../, absolute, rooted, UNC, Windows drive, or URI paths in response_semantics.static_template.file to cause path traversal or out-of-package file inclusion when the generated plugin was deployed. This issue is fixed in version 1.29.1 and 1.32.5.","status":"published","published":"2026-07-16T14:45:36.247Z","modified":"2026-11-07T02:48:39.499021109Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-22","CWE-829"],"updated_at":"2026-11-07T03:08:08.148548Z"},{"id":"GHSA-4jwf-m4wg-8p66","title":"Microsoft Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions","description":"### Summary\n\n`kiota plugin add` / `kiota plugin generate` (with `-t APIPlugin`) emits an attacker-controlled `static_template.file` path from the AI-plugin extensions (`x-ai-adaptive-card`, `x-ai-capabilities`) **verbatim**, with no path validation, into the generated Microsoft 365 Copilot / Teams plugin manifest (`\u003cname\u003e-apiplugin.json`). An attacker-controlled or compromised OpenAPI description can therefore embed a `../` / absolute path into the manifest's `response_semantics.static_template.file`, yielding a **path traversal (CWE-22)** / out-of-package file inclusion (CWE-829) that is resolved by the AI host when the generated plugin is deployed.\n\nConfirmed on Kiota **1.32.4** (`KIOTA_CONFIG_PREVIEW=true`, the self-contained `linux-x64` release binary).\n\n### Details\n\nBoth extension paths write the `static_template.file` reference straight into the manifest without sanitization — `PluginsGenerationService.GetResponseSemanticsFromAdaptiveCardExtension` mints `static_template = {\"file\": \u003cFile\u003e}`, and the `x-ai-capabilities` path copies the `static_template` object through:\n\n```\n# spec                                                  -\u003e generated manifest (functions[].capabilities.response_semantics)\nx-ai-adaptive-card: {title: T, data_path: $.x,\n   file: \"../../../../../../etc/passwd\"}                -\u003e static_template.file = \"../../../../../../etc/passwd\"   (CWE-22)\nx-ai-capabilities.response_semantics.static_template:\n   {file: \"../../../../../../etc/passwd\"}               -\u003e static_template.file = \"../../../../../../etc/passwd\"   (CWE-22)\n```\n\n(`x-ai-adaptive-card.file` only reaches the manifest when `title` is set, so `GetResponseSemanticsFromAdaptiveCardExtension` fires; otherwise kiota writes its own template card instead.)\n\n### Impact\n\n**This is not local code execution on the build host.** The injected path is written into the generated plugin manifest and realized **downstream**, when the plugin is packaged and sideloaded / deployed to an AI host (Microsoft 365 Copilot / Teams) that resolves `static_template.file` relative to the plugin package (out-of-package file reference via `../`). Kiota is the propagation point: it fails to reject `../` and absolute paths in this provider-supplied field before writing it into the manifest.\n\n### Patches\n\nFixed in **1.29.1 and 1.32.5** (https://github.com/microsoft/kiota/pull/7892). `static_template.file` from both `x-ai-adaptive-card` and `x-ai-capabilities` is validated as a relative path confined to the plugin output package: absolute URIs, rooted/UNC paths, Windows drive paths, and `..` traversal segments are rejected, and unsafe references are dropped with a warning. Regression tests cover `..`, absolute paths, and URI values.\n\n### Remediation\n\nUpgrade to Kiota **1.29.1, 1.32.5** or later and regenerate affected plugins.","status":"published","published":"2026-07-24T15:58:31Z","modified":"2026-08-17T15:00:08.105064637Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-22","CWE-829"],"updated_at":"2026-11-02T15:46:37.148947Z"}]}}