Kiota: Path traversal in generated plugin manifest static_template.file reference (percent-encoding bypass)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73851
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-17 15:16:57 UTC
Updated2026-08-17 16:17:47 UTC
DescriptionKiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.34.0, an attacker who controls or tampers with the OpenAPI description consumed by Kiota can supply a file reference that resolves outside the manifest package (e.g. ../../../../etc/passwd, an absolute path, or a file:// / http(s):// URI). When the generated manifest is deployed and consumed by an AI host, this can lead to inclusion or disclosure of files outside the intended package boundary. This vulnerability is fixed in 1.29.1 and 1.34.0.

Risk And Classification

Primary CVSS: v4.0 6.1 MEDIUM from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/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

EPSS: 0.014790000 probability, percentile 0.717160000 (date 2026-08-18)

Problem Types: CWE-22 | CWE-829 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | CWE-829 CWE-829: Inclusion of Functionality from Untrusted Control Sphere

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary6.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/C...
4.0CNADECLARED6.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Active
Confidentiality
None
Integrity
None
Availability
None
Sub Conf.
High
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Kiota affected >= 1.30.0, < 1.34.0 Not specified
CNA Microsoft Kiota affected < 1.29.1 Not specified

References

ReferenceSourceLinkTags
github.com/microsoft/kiota/releases/tag/v1.34.0 [email protected] github.com
github.com/microsoft/kiota/commit/de3d18d9fe31ced4ac749728d3a2f94811f59268 [email protected] github.com
github.com/microsoft/kiota/commit/430008e9d700b3fe80f206c672415cfbd8e830e7 [email protected] github.com
github.com/microsoft/kiota/security/advisories/GHSA-p5rm-jg5c-8c77 [email protected] github.com
github.com/microsoft/kiota/pull/7913 [email protected] github.com
github.com/microsoft/kiota/pull/7910 [email protected] github.com
github.com/microsoft/kiota/issues/7912 [email protected] github.com
github.com/microsoft/kiota/releases/tag/v1.29.1 [email protected] github.com
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