CVE-2026-73851
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:// /…
Does this matter?
Lower severity and a low EPSS score (1.48%). Track it; it rarely justifies an emergency change on its own.
Description
Kiota 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.
- CVSS 4.0
- 6.1 MEDIUMCVSS: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/M
- EPSS
- 1.48% probability · 72th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22, CWE-829
- Source
- security-advisories@github.com
References
- https://github.com/microsoft/kiota/commit/430008e9d700b3fe80f206c672415cfbd8e830e7
- https://github.com/microsoft/kiota/commit/de3d18d9fe31ced4ac749728d3a2f94811f59268
- https://github.com/microsoft/kiota/issues/7912
- https://github.com/microsoft/kiota/pull/7910
- https://github.com/microsoft/kiota/pull/7913
- https://github.com/microsoft/kiota/releases/tag/v1.29.1
- https://github.com/microsoft/kiota/releases/tag/v1.34.0
- https://github.com/microsoft/kiota/security/advisories/GHSA-p5rm-jg5c-8c77
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.