warmcat libwebsockets up to 4.5.8 SSH Protocol sshd.c lws_ssh_parse_plaintext msg_len resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability was found in warmcat libwebsockets up to 4.5.8. It has been rated as problematic. Impacted is the function lws_ssh_parse_plaintext of the file plugins/protocol_lws_ssh_base/sshd.c of the component SSH Protocol Handler. The manipulation of the argument msg_len leads to resource consumption. This vulnerability is referenced as CVE-2026-10650. Remote exploitation of the attack is possible. Furthermore, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in warmcat libwebsockets up to 4.5.8. It has been rated as problematic. 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. The manipulation of the argument msg_len with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-10650. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The exploit is available at github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 318419 (Linux Distros Unpatched Vulnerability : CVE-2026-10650), which helps to determine the existence of the flaw in a target environment.

Applying the patch 3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (318419). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Programming Language: 🔒
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318419
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-10650

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498

Timelineinfo

06/02/2026 Advisory disclosed
06/02/2026 +0 days VulDB entry created
06/07/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-10650 (🔒)
GCVE (CVE): GCVE-0-2026-10650
GCVE (VulDB): GCVE-100-367955
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/02/2026 17:24
Updated: 06/07/2026 22:07
Changes: 06/02/2026 17:24 (60), 06/04/2026 05:59 (2), 06/07/2026 22:07 (31)
Complete: 🔍
Submitter: biniam
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #830261: warmcat libwebsockets 4.5.99-v4.5.0-382-g4a63b9333 Uncontrolled Memory Allocation (by biniam)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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