This report was translated by AI; nobody has reviewed the translation yet. Original language: Czech.

[TLP:CLEAR] Curl fixes 1 vulnerability

Curl version 8.14.1 fixes a vulnerability in the libcurl library [1].

libcurl - DoS (CVE-2025-5399)
CVSS 7.5 (High)

An unauthenticated remote attacker can, due to a faulty WebSocket implementation in the libcurl library, trigger an infinite loop by sending specially crafted packets and thus potentially perform a DoS attack on dependent applications [1]. The system is not vulnerable if the automatic reply function is disabled using the 'CURLWS_NOAUTOPONG' option. The curl tool is not affected by this vulnerability.

The vulnerability is present in product:

  • *:curl; >=8.13.0, <=8.14.0;

CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

More information:

The vulnerability was publicly disclosed 4. 6. 2025.


By CESNET, z.s.p.o. Michaela Ručková on 4. 6. 2025.

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