Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV L L P N P H H H 7.3 .0042 35.3 —
AFFECTED Product Versions Fixed kiota >= 1.30.0, < 1.31.1 – —
TIMELINE Apr 17 Reserved by GitHub_M Apr 22 Published (CNA: GitHub_M) Aug 17 EXPLOIT PUBLISHED — CVE-2026-41134 (microsoft kiota). Public exploit reference added.
Kiota is an OpenAPI based HTTP Client code generator. Versions prior to 1.29.1 and 1.31.1 are affected by a code-generation literal injection vulnerability in multiple writer sinks (for example: serialization/deserialization keys, path/query parameter mappings, URL template metadata, enum/property metadata, and default value emission). When malicious values from an OpenAPI description are emitted into generated source without context-appropriate escaping, an attacker can break out of string literals and inject additional code into generated clients. This issue is only practically exploitable when the OpenAPI description used for generation is from an untrusted source, or a normally trusted OpenAPI description has been compromised/tampered with. Only generating from trusted, integrity-protected API descriptions significantly reduces the risk. To remediate the issue, upgrade Kiota to 1.29.1, 1.31.1, or later and regenerate/refresh existing generated clients as a precaution. Refreshing generated clients ensures previously generated vulnerable code is replaced with hardened output.
| Date | Event | Detail |
|---|---|---|
| April 17, 2026 | Reserved | Reserved by GitHub_M |
| April 22, 2026 | Published | Published (CNA: GitHub_M) |
| August 17, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-41134 (microsoft kiota). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| microsoft | kiota | — | >= 1.30.0, < 1.31.1 | — |
Authoritative record: CVE-2026-41134 at cve.org
Vendors: microsoft
Weaknesses: CWE-94
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-41134 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.