libcurl 7.71.0 < 8.20.0 Cookie Leak via Stale Host Header

The version of libcurl installed on the remote host is 7.71.0 prior to 8.20.0. It is, therefore, affected by a cookie leak vulnerability: - When using the same connection handle for multiple HTTP requests, if a custom Host: header is removed in a subsequent request, the second request would use...

CVE-2026-1965

libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of...

curl: CVE-2026-3784: wrong proxy connection reuse with credentials

Summary libcurl may reuse an existing HTTP proxy CONNECT tunnel without matching proxy credentials when selecting a reusable connection. In lib/url.c, urlmatchproxyuse calls proxyinfomatches lib/url.c:930-935 → lib/url.c:589-595, and that matcher compares proxy type, host, and port but does not...

curl: State Isolation Failure in Multiplexed Connections (Shared Auth Context)

Vulnerability: State Isolation Failure in Multiplexed Connections Shared Auth Context Product: libcurl Affected Versions: v7.43.0 - Current v8.x - All versions supporting HTTP/2 Multiplexing Severity: CRITICAL CVSS: 9.1 1. Executive Summary A fundamental design flaw exists in libcurl's state...

Flash Player Bug An Eavesdropper's Delight

Adobe yesterday patched a not-so-sweet 16 Flash Player vulnerabilities, including a zero day under attack. While not much is known about the targeted attacks using the Flash Player bug, or its victims, details have surfaced on another patched flaw that is a potential privacy nightmare...