# Microsoft.Kiota.Abstractions (NuGet) vulnerabilities

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 2.1.6 (Nov 3, 2026): no advisory affects it
- Newest unaffected release: 2.1.6 (Nov 3, 2026), the latest release
- Releases: 124 since 1.0.0 (Feb 27, 2023)
- Registry: https://www.nuget.org/packages/Microsoft.Kiota.Abstractions
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-44503: 1.0.0-preview.1 to 1.21.3 (1.22.0 is outside it)

## Advisories (1)

### [CVE-2026-44503](https://cve.now/CVE-2026-44503): Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect

- Severity: High 7.0
- Published: May 14, 2026
- Affected: fixed in 1.22.0.
- Fixed in 1.22.0 (released Mar 3, 2026, 72 days before disclosure).
- The latest release, 2.1.6, is not affected.

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