CVE-2026-4374
Last modified
CVE-2026-4374 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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>. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
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>
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Rti | Connext Professional | >= 5.3.0, <= 5.3.1.45 |
| Rti | Connext Professional | >= 6.0.0, <= 6.0.1.40 |
| Rti | Connext Professional | >= 6.1.0, <= 6.1.2.27 |
| Rti | Connext Professional | >= 7.0.0, < 7.3.1.1 |
| Rti | Connext Professional | >= 7.4.0, < 7.7.0 |
References
- https://www.rti.com/vulnerabilities/#cve-2026-4374Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-4374?
How severe is CVE-2026-4374?
How do I fix CVE-2026-4374?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-43732A path handling issue was addressed with improved validation…6.5
- CVE-2026-43733The issue was addressed with improved memory handling. This …7.8
- CVE-2026-43734A use-after-free issue was addressed with improved memory ma…6.5
- CVE-2026-43735The issue was addressed with improved checks. This issue is …8.1
- CVE-2026-43738The issue was addressed with improved memory handling. This …5.5
- CVE-2026-43739An out-of-bounds write issue was addressed with improved bou…5.5
- CVE-2026-43740The issue was addressed with improved memory handling. This …6.5
- CVE-2026-43742A use-after-free issue was addressed with improved memory ma…6.5
- CVE-2026-43743A race condition was addressed with improved state handling.…4.7
- CVE-2026-43744An out-of-bounds write issue was addressed with improved bou…5.5
- CVE-2026-43745An out-of-bounds write issue was addressed with improved inp…6.5
- CVE-2026-43746A use-after-free issue was addressed with improved memory ma…6.5
Are you affected by CVE-2026-4374?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST