CVE-2026-11352
QUIC zero-length UDP datagrams busy-loop
Description
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 toward the per-call packet budget, a connected QUIC peer can continuously stream empty datagrams to indefinitely stall the client.
INFO
Published Date :
July 3, 2026, 6:12 a.m.
Last Modified :
July 3, 2026, 6:12 a.m.
Remotely Exploit :
No
Source :
curl
Affected Products
The following products are affected by CVE-2026-11352
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update curl or libcurl to the latest version.
- Ensure the QUIC UDP receive function is properly implemented.
- Validate packet budget calculations for QUIC.
- Monitor network traffic for empty datagrams.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-11352 vulnerability anywhere in the article.