CVE-2026-10650
warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption
CVSS Score
5.3
EPSS Score
0.1%
EPSS Percentile
17th
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.
| CWE | CWE-400 CWE-404 |
| Vendor | warmcat |
| Product | libwebsockets |
| Published | Jun 2, 2026 |
| Last Updated | Jun 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
warmcat / libwebsockets
4.5.0 4.5.1 4.5.2 4.5.3 4.5.4 4.5.5 4.5.6 4.5.7 4.5.8
References
vuldb.com: https://vuldb.com/vuln/367955 vuldb.com: https://vuldb.com/vuln/367955/cti vuldb.com: https://vuldb.com/cve/CVE-2026-10650 vuldb.com: https://vuldb.com/submit/830261 github.com: https://github.com/biniamf/pocs/tree/main/libwebsockets_sshd-parse-ic-unbounded-alloc github.com: https://github.com/biniamf/pocs/blob/main/libwebsockets_sshd-parse-ic-unbounded-alloc/poc_sshd_unbounded_alloc.py github.com: https://github.com/warmcat/libwebsockets/commit/3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498 github.com: https://github.com/warmcat/libwebsockets/
Credits
🔍 biniam (VulDB User)