CVE-2026-44503

high

Published 2026-05-07 · Modified 2026-05-14

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CVSS v3

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CVSS v4 NEW

7.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/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

VIR risk

8.0

Description

Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Maven	com.microsoft.kiota:microsoft-kiota-abstractions	`<1.9.1`	`1.9.1`
NuGet	Microsoft.Kiota.Abstractions	`<1.22.0`	`1.22.0`
PyPI	microsoft-kiota-http	`<1.9.9`	`1.9.9`
npm	kiota-typescript	`<1.0.0-preview.100`	`1.0.0-preview.100`
Go	github.com/microsoft/kiota-http-go	`<1.5.5`	`1.5.5`
GO	github.com/microsoft/kiota-http-go	`< 1.5.5`	`1.5.5`
NPM	kiota-typescript	`< 1.0.0-preview.100`	`1.0.0-preview.100`
PIP	microsoft-kiota-http	`< 1.9.9`	`1.9.9`
NUGET	Microsoft.Kiota.Abstractions	`< 1.22.0`	`1.22.0`
MAVEN	com.microsoft.kiota:microsoft-kiota-abstractions	`< 1.9.1`	`1.9.1`

References

CWEs

CWE-601

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.