Resource Consumption Vulnerability in warmcat libwebsockets SSH Protocol Handler
CVE-2026-10650

6.9MEDIUM

Key Information:

Vendor

Warmcat

Status
Libwebsockets
Vendor
CVE Published:
2 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-10650?

A flaw exists in the warmcat libwebsockets product that affects the SSH Protocol Handler's function lws_ssh_parse_plaintext. An attacker can exploit this vulnerability by manipulating the msg_len argument, leading to potential resource consumption issues. This vulnerability can be exploited remotely, making it crucial for users of affected versions to apply the available patch (commit 3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498) to remediate the issue effectively.

Affected Version(s)

libwebsockets 4.5.0

libwebsockets 4.5.1

libwebsockets 4.5.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-10650 - Proof of Concept

CVE-2026-10650 - Proof of Concept

References

https://vuldb.com/vuln/367955
vdb-entrytechnical-description
https://vuldb.com/vuln/367955/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-10650
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

biniam (VulDB User)
.