What is CVE-2026-43969?

CVE-2026-43969 is a security advisory published by Microsoft Security Response Center (MSRC). Cookie Request Header Injection via Unvalidated Encoder in cow_cookie:cookie/1

Which CVE IDs does CVE-2026-43969 cover?

CVE-2026-43969 covers the following CVE IDs: CVE-2026-43969. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

CVE-2026-43969

Cookie Request Header Injection via Unvalidated Encoder in cow_cookie:cookie/1

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-43969 →