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CVE-2025-5399

CVE-2025-5399 · WebSocket endless loop

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which makes libcurl get trapped in an endless busy-loop. There is no other way for the application to escape or exit this loop other than killing the thread/process. This might be used to DoS libcurl-using application.

CVSS 7.5 · High · EPSS 1.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • curl

    Versions
    • ≥ 8.14.0, ≤ 8.14.0: Affected (semver)
    • ≥ 8.13.0, ≤ 8.13.0: Affected (semver)

    No fix published

  • curl Debian:13

    Affected ranges
    • ECOSYSTEM: < 8.14.1-1

    Update to 8.14.1-1

  • curl Debian:14

    Affected ranges
    • ECOSYSTEM: < 8.14.1-1

    Update to 8.14.1-1

Original sources

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