CVE-2026-80443: HAVELSAN Sef improper certificate validation

CVE-2026-80443 · Severity: high · CVSS 7.4 · Published 2026-10-02

Sef is an AI chatbot platform used for conversational interactions. An improper certificate validation flaw allows an attacker to intercept and manipulate communications between users and the platform, potentially exposing sensitive data or injecting malicious content. The vulnerability affects versions before 2.1, and the vendor has indicated the product is no longer supported.

Technologies: HAVELSAN Inc. Sef AI Chatbot Platform. Vendors: HAVELSAN Inc..

Quick answers

Is CVE-2026-80443 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-80443 being exploited in the wild.
How severe is CVE-2026-80443?
High severity, with a CVSS score of 7.4, published 2 October 2026.
Which products and versions are affected?
HAVELSAN Inc. Sef AI Chatbot Platform before 2.1.
Is there a fix for CVE-2026-80443?
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-2026-80443 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-80443?
Check whether you run HAVELSAN Inc. Sef AI Chatbot Platform 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 vulnerability is an improper certificate validation flaw in the Sef AI Chatbot Platform that enables Adversary-in-the-Middle (AiTM) attacks. This allows a network-positioned attacker to intercept TLS/SSL communications without proper validation, compromising confidentiality and integrity of communications. No patched version is currently available given the product's unsupported status.

Affected products

  • HAVELSAN Inc. Sef - AI Chatbot Platform before 2.1

Timeline

  • 2026-10-02: disclosed

References

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