CVE-2026-44503GHSA-7J59-V9QR-6FQ9GO-2026-5224PYSEC-2026-2647
Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.9.1, 1.22.0, 1.5.5, 1.0.0-preview.100, 1.9.9
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- microsoft kiota-java
fixed in 1.9.1
- microsoft Microsoft.Kiota.Abstractions
fixed in 1.22.0
- microsoft github.com/microsoft/kiota-http-go
fixed in 1.5.5
- microsoft kiota-typescript
fixed in 1.0.0-preview.100
- microsoft microsoft-kiota-abstractions
fixed in 1.9.1
- microsoft microsoft-kiota-http
fixed in 1.9.9
- com.microsoft.kiota:microsoft-kiota-abstractionsMaven
fixed in 1.9.1
- Microsoft.Kiota.AbstractionsNuGet
fixed in 1.22.0
- microsoft-kiota-httpPyPI
fixed in 1.9.9
- kiota-typescriptnpm
fixed in 1.0.0-preview.100
- github.com/microsoft/kiota-http-goGo
fixed in 1.5.5