CVE-2026-94018 PUBLISHED

NetX Duo Web HTTP server releases an uninitialized packet pointer on the PUT Content-Length underflow path

Assigner: eclipse
Reserved: 23.09.2026 Published: 20.10.2026 Updated: 20.10.2026

The Web add-on's HTTP server dereferences and releases an uninitialized pointer when it detects a Content-Length underflow while processing a PUT request. The condition is reachable by an unauthenticated remote client with a single malformed request.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Eclipse Foundation
Product	Eclipse ThreadX - NetX Duo
Versions	Default: unaffected affected from 6.4.2 to 6.5.1.202602 (incl.) Version 6.5.2.202603 is unaffected

Credits

Yves57 reporter

References

https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-wjxf-gjm5-jh5q

Problem Types

CWE-457 Use of Uninitialized Variable CWE
CWE-824 Access of Uninitialized Pointer CWE