CVE-2026-11352

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

03/07/2026

Last modified:

07/07/2026

Description

An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server<br /> to trigger a remote denial of service against a curl or libcurl client.<br /> Because the helper function discards zero-length UDP datagrams before counting<br /> them toward the per-call packet budget, a connected QUIC peer can continuously<br /> stream empty datagrams to indefinitely stall the client.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High