Bug 2552784 (CVE-2026-102944)

Summary: CVE-2026-102944 cpp-httplib: cpp-httplib: Information disclosure via unstripped cookie headers in cross-origin redirects
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in cpp-httplib. When following cross-origin HTTP redirects, the client fails to remove Cookie headers before sending the request to the new target. A remote attacker controlling a redirect server or observing unencrypted traffic can exploit this flaw to capture session cookies intended for the original origin, resulting in information disclosure.
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Bug Depends On: 2553108, 2553109    
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Description OSIDB Bzimport 2026-10-14 18:42:38 UTC 
cpp-httplib is a C++ header-only HTTP/HTTPS library. Prior to 0.51.0, create_redirect_client() removes Host, Proxy-Authorization, and Authorization headers when following a cross-origin 301, 302, 307, or 308 redirect but leaves Cookie headers attached. detail::redirect() copies the request for those redirect codes, so cookies supplied directly or through default_headers_ are sent to the redirect target. An attacker who controls a redirect response, or a network position for a non-HTTPS origin, can receive session cookies intended for the original origin. A 303 redirect is not affected because that path clears all request headers. This issue is fixed in version 0.51.0.