CVE-2026-4374 XML external entity in Connext Professional
Attackers can exploit XML External Entity flaws in RTI Connext Professional services to read sensitive data or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4374?
CVE-2026-4374 is a high-severity vulnerability in RTI Connext Professional, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Recording Service,Routing Service,Queueing Service,Cloud Discovery Service,Observability Collector) allows Serialized Data External Linking, Data Serialization External Entities Blowup. This issue affects Connext Professional: from 7.4.0 before 7.7.0, from 7.0.0 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.*.
Weakness: CWE-611
Which versions are affected by CVE-2026-4374?
It affects 1 product.
Products include Rti Connext Professional.
How do I fix CVE-2026-4374?
No fix has been published for CVE-2026-4374 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4374 being exploited?
There is no known exploitation of CVE-2026-4374 in the wild and no public exploit code.
Other vulnerabilities in RTI Connext Professional
- CVE-2026-2467 Memory corruption in Connext Professional
- CVE-2026-3894 Out-of-bounds Read vulnerability in RTI Connext Professional (Core Libraries) allows Overread Buffers.
- CVE-2024-52057 SQL injection in Connext Professional
- CVE-2026-7300 Memory corruption in Connext Professional
- CVE-2025-14543 XML external entity in Connext Professional
Sources
Also known as GHSA-f5w8-q66w-xp9m.