CVE-2026-44503

HIGH

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v4 7.0
EPSS 0.0008
EPSS Percentile 23.3%
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

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-601
Status published
Products (11)
com.microsoft.kiota/microsoft-kiota-abstractions 0 - 1.9.1Maven
microsoft/github.com/microsoft/kiota-http-go < 1.5.5
microsoft/kiota-http-go 0 - 1.5.5Go
microsoft/kiota-java < 1.9.1
microsoft/kiota-typescript < 1.0.0-preview.100
microsoft/microsoft-kiota-abstractions < 1.9.1
microsoft/microsoft-kiota-http < 1.9.9
microsoft/Microsoft.Kiota.Abstractions < 1.22.0
npm/kiota-typescript 0 - 1.0.0-preview.100npm
nuget/Microsoft.Kiota.Abstractions 0 - 1.22.0NuGet
... and 1 more
Published May 14, 2026
Tracked Since May 14, 2026