TI-2026-09152 Aliases CVE-2026-10650 GHSA-23jv-8gf4-7r88

warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption

HIGH 70CWE-400Published 2026-06-02 · Updated 2026-06-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00429 37th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by the CNA

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
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	—	No fix listed	CNA

libwebsockets Vendorwarmcat Affected 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 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:warmcat:libwebsockets::::::::	—	—	warmcat

cpe:2.3:a:warmcat:libwebsockets:*:*:*:*:*:*:*:* Versions — — ·warmcat

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
A-MQ Interconnect 1	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 16.2	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 17.1	Affected	No fix yet: Fix deferred
Red Hat Service Interconnect 1	Affected	No fix yet: Fix deferred
Red Hat Service Interconnect 2	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-10650
2026-10-03 Alias added: GHSA-23jv-8gf4-7r88

References

Exploit 2

Patch 1

https://github.com/warmcat/libwebsockets/commit/3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498

Other 1

https://github.com/warmcat/libwebsockets/

TI-2026-54362 warmcat libwebsockets LECP CBOR Recording lecp.c report_raw_cbor out-of-bounds write CVSS 4.0MEDIUM 6.9
TI-2025-01611 Undefined Behavior Due to Out-of-Bounds Pointer Arithmetic in libwebsockets CVSS 4.0CRITICAL 10.0
TI-2025-10708 Stack-based Buffer Overflow in libwebsockets DNS response parsing CVSS 4.0HIGH 7.5
TI-2025-10707 Use After Free in libwebsockets WebSocket server CVSS 4.0MEDIUM 6.3
TI-2025-10710 Out-of-bounds Write in libwebsockets PNG parsing CVSS 4.0MEDIUM 5.9
TI-2025-10709 Out-of-bounds Read in libwebsockets PNG parsing CVSS 4.0MEDIUM 5.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences