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

Quick assessment

Affected
warmcat libwebsockets
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Libwebsockets是lws-team开源的一个规范的 libwebsockets 网络库。 Libwebsockets 4.5.8及之前版本存在安全漏洞，该漏洞源于SSH Protocol Handler组件中文件plugins/protocol_lws_ssh_base/sshd.c的lws_ssh_parse_plaintext函数对参数msg_len的操作，可能导致资源消耗。

CVSS 5.3 · Medium EPSS 0.43% · P36

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 9

VendorProduct Version RangeStatus
warmcat libwebsockets 4.5.0 affected
4.5.1 affected
4.5.2 affected
4.5.3 affected
4.5.4 affected
4.5.5 affected
4.5.6 affected
4.5.7 affected
… +1 more rows
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I. Basic Information for CVE-2026-10650

Vulnerability Information
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Vulnerability Title
warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Libwebsockets 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Libwebsockets是lws-team开源的一个规范的 libwebsockets 网络库。 Libwebsockets 4.5.8及之前版本存在安全漏洞，该漏洞源于SSH Protocol Handler组件中文件plugins/protocol_lws_ssh_base/sshd.c的lws_ssh_parse_plaintext函数对参数msg_len的操作，可能导致资源消耗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
warmcat libwebsockets 4.5.0 cpe:2.3:a:warmcat:libwebsockets:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-10650

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III. Intelligence Information for CVE-2026-10650

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Patches & Fixes for CVE-2026-10650 (1)

Proof of Concept for CVE-2026-10650 (2)

IV. Related Vulnerabilities

Same product: libwebsockets
Same vendor: warmcat
Same weakness: CWE-400

V. Comments for CVE-2026-10650

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