🛡️ CVE-2026-11352 on Alpine — curl

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Distribution advisory

This page covers CVE-2026-11352 as tracked by Alpine, for the package curl. The fix is available in version 8.21.0-r0; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

ALPINE-CVE-2026-11352 is recorded against 1 package.

  • curl (from 8.18.0 up to 8.21.0-r0)

Timeline and source

Published on 3 July 2026 and last revised on 8 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security.alpinelinux.org (Advisory)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-03
Updated 2026-08-11
Modified 2026-07-08
Fix URL N/A

Affected Packages

Software From version Fixed in
curl 8.18.0 8.21.0-r0

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ALPINE-CVE-2026-11352 is rated CVSS 7.5 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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