CVE-2026-77707: HAVELSAN Liman Render Engine improper certificate validation

CVE-2026-77707 · Severity: medium · CVSS 5.9 · Published 2026-09-24

HAVELSAN's Liman Render Engine, a rendering component for visualization applications, contains a flaw in certificate validation that allows an attacker positioned between a client and server to intercept and manipulate encrypted communications. An attacker exploiting this vulnerability could eavesdrop on sensitive data or inject malicious content into the communication stream.

Technologies: HAVELSAN Liman Render Engine. Vendors: HAVELSAN.

Quick answers

Is CVE-2026-77707 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-77707 being exploited in the wild.
How severe is CVE-2026-77707?
Medium severity, with a CVSS score of 5.9, published 24 September 2026.
Which products and versions are affected?
HAVELSAN Liman Render Engine 1.0 to before 1.2-75.
Is there a fix for CVE-2026-77707?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-77707 attacked?
It is attacked over the network.
Am I affected by CVE-2026-77707?
Check whether you run HAVELSAN Liman Render Engine at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The Liman Render Engine fails to properly validate SSL/TLS certificates during connection establishment, enabling man-in-the-middle attacks over a network. This allows an adversary on the network path to intercept encrypted communications without detection. The vulnerability affects versions 1.0 through 1.2-75 and requires network positioning but no authentication or user interaction.

Affected products

  • HAVELSAN Liman Render Engine 1.0 to before 1.2-75

Timeline

  • 2026-09-24: disclosed

References

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