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CVE-2026-10650

warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption

CVSS 6.9 MEDIUMEPSS 0.4%CWE-400CWE-404
Vexday Risk Score
33Atenção
Decisão SSVC (CISA)
Attend
PoC disponível → acompanhar de perto
CVSS 6.9EPSS 0.4%KEV nãoPoC públicaNuclei —Metasploit —Patch referenciado
Ciclo de vida
02 jun 2026Publicada no NVD
Recomendação: Planejar correção próxima — já existe PoC pública.
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Produtos afetados
warmcat · libwebsockets
PoCs públicas encontradas — 2
cve_referencegithub.com/biniamf/pocs/blob/main/libwebsockets_sshd-parse-ic-unbounded-alloc/poc_sshd_unbounded_alloc.pynão verificadocve_referencegithub.com/biniamf/pocs/tree/main/libwebsockets_sshd-parse-ic-unbounded-allocnão verificado
⚠ Recursos públicos, para você avaliar a exposição de sistemas que controla ou está autorizado a testar. Teste apenas com autorização.

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Referências
https://github.com/biniamf/pocs/blob/main/libwebsockets_sshd-parse-ic-unbounded-alloc/poc_sshd_unbounded_alloc.pyhttps://github.com/biniamf/pocs/tree/main/libwebsockets_sshd-parse-ic-unbounded-allochttps://github.com/warmcat/libwebsockets/https://github.com/warmcat/libwebsockets/commit/3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498https://vuldb.com/cve/CVE-2026-10650https://vuldb.com/submit/830261https://vuldb.com/vuln/367955https://vuldb.com/vuln/367955/cti