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

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

CVE-2026-44503

Exact risk observation. Current source statements above are a separate evidence layer. Latest risk evidence.

No KEV entry is attached to this observation; this is not evidence that exploitation is absent.

FIRST EPSS: 0.94 % · percentile 60.53 % · scored 24 Oct 2026. Retained older prediction.

Observed 25 Oct 2026 02:24:38 UTC · Complete immutable risk JSON

Immutable source observations

6 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

28 Oct 2026 06:08:11 UTC

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…

euvd · EUVD-2026-30323 · Published

27 Oct 2026 11:12:17 UTC

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…

nvd · CVE-2026-44503 · Published

25 Oct 2026 10:17:27 UTC

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…

nvd · CVE-2026-44503 · Published

24 Oct 2026 13:19:41 UTC

Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect in github.com/microsoft/kiota-http-go

osv · GO-2026-5224 · Published

23 Oct 2026 16:01:25 UTC

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

osv · GHSA-7j59-v9qr-6fq9 · Published

23 Oct 2026 15:48:27 UTC

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

cve-program · CVE-2026-44503 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 28 Oct 11:30 UTC · 270 of 272 readable · 268 fully read · documentation 469/469 current