CVE-2026-4374 HIGH

CVE-2026-4374: Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (multiple infrastructure services) allows Serialized Data External Linking, Data Serialization External Entities Blowup.

Vendor Rti
Product Connext Professional
Weakness CWE-611 · XXE
Published April 1, 2026
Last update June 18, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Cloud Discovery Service, Recording Service, Routing Service, Queueing Service, Observability Collector) allows Serialized Data External Linking, Data Serialization External Entities Blowup.<p>This issue affects Connext Professional: from 7.4.0 before 7.7.0, from 7.1.0 before 7.3.1.1, from 6.1.0 before 6.1.2.34, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*.</p>

Key dates

02Disclosure timeline

April 1, 2026 CVE published
June 18, 2026 Record updated