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Fortinet PSIRT AdvisoriesFG-IR-26-169

Open Redirect on FortiSIEM

LowVendor CVSS 3.1 / 10 1 CVE Published Sep 8, 2026 at 7:00 AM UTC

Summary

CVSSv3 Score:

3.1

An URL redirection to untrusted site ('open redirect') [CWE-601] vulnerability in FortiSIEM may allow an authenticated attacker to cause a redirection to any website via specially crafted HTTP requests

Revised on 2026-09-08 00:00:00

Products covered

  • FortiSIEM

Remediation

Separate remediation guidance was not included in the collected bulletin.

CVEs in this advisory 1

Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed the advisory summary.
    • CVSS changed from 2.8 to 3.1.
    • Added CVEs: CVE-2026-84389.

Updates

  1. Published by Fortinet

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.