The RedirectHandler middleware in microsoft/kiota-java (com.microsoft.kiota:microsoft-kiota-http-okHttp v1.9.0) and other Kiota libraries fails to strip sensitive HTTP headers when following 3xx redirects to a different host or scheme. Only the Authorization header is removed; Cookie, Proxy-Authorization, and all custom headers are forwarded to the redirect target.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
microsoft kiota-java affected
Version Status Constraints
< 1.9.1 affected —
microsoft Microsoft.Kiota.Abstractions affected
Version Status Constraints
< 1.22.0 affected —
microsoft github.com/microsoft/kiota-http-go affected
Version Status Constraints
< 1.5.5 affected —
microsoft kiota-typescript affected
Version Status Constraints
< 1.0.0-preview.100 affected —
microsoft microsoft-kiota-abstractions affected
Version Status Constraints
< 1.9.1 affected —
microsoft microsoft-kiota-http affected
Version Status Constraints
< 1.9.9 affected —

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Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-7j59-v9qr-6fq9 Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9 cve-icon cve-icon cve-icon
History

Thu, 14 May 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 14 May 2026 16:15:00 +0000

Type Values Removed Values Added
Description The RedirectHandler middleware in microsoft/kiota-java (com.microsoft.kiota:microsoft-kiota-http-okHttp v1.9.0) and other Kiota libraries fails to strip sensitive HTTP headers when following 3xx redirects to a different host or scheme. Only the Authorization header is removed; Cookie, Proxy-Authorization, and all custom headers are forwarded to the redirect target.
Title Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect
Weaknesses CWE-601
References
Metrics cvssV4_0

{'score': 7, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-14T19:51:10.682Z

Reserved: 2026-05-06T18:28:20.886Z

Link: CVE-2026-44503

cve-icon Vulnrichment

Updated: 2026-05-14T18:02:18.424Z

cve-icon NVD

Status : Deferred

Published: 2026-05-14T16:16:24.223

Modified: 2026-05-14T20:17:08.177

Link: CVE-2026-44503

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-14T17:45:25Z

Weaknesses