Vulnerability in Curl

CVE-2026-11352

An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them towar…

Affected products

  • Curl — versions 8.20.0, 8.19.0, 8.18.0

References