CVE-2026-10650 — warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption

Affected: warmcat libwebsockets

A flaw has been found in warmcat libwebsockets up to 4.5.8. This issue affects the function lws_ssh_parse_plaintext of the file plugins/protocol_lws_ssh_base/sshd.c of the component SSH Protocol Handler. Executing a manipulation of the argument msg_len can lead to resource consumption. The attack may be launched remotely. The exploit has been published and may be used. This patch is called 3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498. A patch should be applied to remediate this issue.

USN-8822-1 — libwebsockets vulnerabilities

Affected: Ubuntu:Pro:20.04:LTS: libwebsockets, Ubuntu:Pro:22.04:LTS: libwebsockets, Ubuntu:Pro:24.04:LTS: libwebsockets, Ubuntu:26.04:LTS: libwebsockets

It was discovered that Libwebsockets incorrectly handled certain SSH protocol messages in its SSH protocol handler. A remote attacker could possibly use this issue to cause Libwebsockets to consume excessive resources, resulting in a denial of service. (CVE-2026-10650)

It was discovered that Libwebsockets incorrectly handled certain malformed CBOR data. A remote attacker could possibly use this issue to cause Libwebsockets to crash, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-78161)

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CVE-2026-10650 — warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption

USN-8822-1 — libwebsockets vulnerabilities