{"api_version":"1","generated_at":"2026-08-28T03:53:01+00:00","cve":"CVE-2026-77358","urls":{"html":"https://cve.report/CVE-2026-77358","api":"https://cve.report/api/cve/CVE-2026-77358.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-77358","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77358"},"summary":{"title":"cpp-httplib: Use-after-free of TLS session in WebSocketClient::shutdown_and_close()","description":"cpp-httplib is a C++ header-only HTTP/HTTPS library. In versions 0.33.0 through 0.50.0, the TLS-enabled WebSocket client frees the TLS session before closing the WebSocket that still uses it, producing a use-after-free. In WebSocketClient::shutdown_and_close the SSL object is freed and the pointer cleared, but the subsequent WebSocket close still sends a close frame through the SSL socket stream, which holds a raw copy of the now-dangling session pointer and reads from and writes to the freed memory. The same freed-then-used ordering is reachable through the client's destructor and its connect path, so ordinary teardown of a secure WebSocket connection triggers the defect. 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In versions 0.33.0 through 0.50.0, the TLS-enabled WebSocket client frees the TLS session before closing the WebSocket that still uses it, producing a use-after-free. In WebSocketClient::shutdown_and_close the SSL object is freed and the pointer cleared, but the subsequent WebSocket close still sends a close frame through the SSL socket stream, which holds a raw copy of the now-dangling session pointer and reads from and writes to the freed memory. The same freed-then-used ordering is reachable through the client's destructor and its connect path, so ordinary teardown of a secure WebSocket connection triggers the defect. This issue is fixed in version 0.50.1.","Type":"Description","Title":"cpp-httplib: Use-after-free of TLS session in WebSocketClient::s"}]}}}