CVE-2026-126177: Fortinet FortiAnalyzer XML injection in SAML

CVE-2026-126177 · Severity: high · CVSS 8.1 · Published 2026-11-11

FortiAnalyzer and FortiManager are central management and logging platforms used by enterprises to monitor and analyze security events across their networks. An unauthenticated attacker can inject malicious content into SAML authentication responses, potentially bypassing authentication controls and gaining unauthorized access to the system. This could allow an attacker to access sensitive security logs, modify configurations, or compromise the management infrastructure.

Technologies: Fortinet Fortianalyzer, Fortinet Fortianalyzer Cloud, Fortinet FortiManager, Fortinet FortiManager Cloud. Vendors: Fortinet.

Quick answers

Is CVE-2026-126177 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-126177 being exploited in the wild.
How severe is CVE-2026-126177?
High severity, with a CVSS score of 8.1, published 11 November 2026.
Which products and versions are affected?
Fortinet Fortianalyzer 8.0.0, 7.6.0-7.6.7, 7.4.0-7.4.11, 7.2.0-7.2.12; Fortinet Fortianalyzer Cloud 8.0.0, 7.6.0-7.6.7, 7.4.1-7.4.11, 7.2.1-7.2.12; Fortinet FortiManager 8.0.0, 7.6.0-7.6.7, 7.4.0-7.4.11, 7.2.0-7.2.12; Fortinet FortiManager Cloud 8.0.0, 7.6.0-7.6.7, 7.4.1-7.4.11, 7.2.1-7.2.12.
Is there a fix for CVE-2026-126177?
Yes: fixed in FortiAnalyzer 8.0.1, 7.6.8, 7.4.12, 7.2.13; FortiAnalyzer Cloud 8.0.1, 7.6.8, 7.4.12, 7.2.13; FortiManager 8.0.1, 7.6.8, 7.4.12, 7.2.13; FortiManager Cloud 8.0.1, 7.6.8, 7.4.12, 7.2.13. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-126177 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-126177?
Check whether you run Fortinet Fortianalyzer, Fortinet Fortianalyzer Cloud, Fortinet FortiManager or one of the others listed 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.

How to fix

  • Fixed in: FortiAnalyzer 8.0.1, 7.6.8, 7.4.12, 7.2.13; FortiAnalyzer Cloud 8.0.1, 7.6.8, 7.4.12, 7.2.13; FortiManager 8.0.1, 7.6.8, 7.4.12, 7.2.13; FortiManager Cloud 8.0.1, 7.6.8, 7.4.12, 7.2.13

Technical details

The vulnerability is an XML injection (blind XPath injection) in the SAML authentication component that allows unauthenticated remote attackers to inject arbitrary content into signed SAML responses through crafted SAML requests. The attack targets the API component and requires no prior authentication or user interaction. A successful exploit could result in SAML response tampering, leading to authentication bypass and access to sensitive security data.

Affected products

  • Fortinet FortiAnalyzer 8.0.0, 7.6.0-7.6.7, 7.4.0-7.4.11, 7.2.0-7.2.12
  • Fortinet FortiAnalyzer Cloud 8.0.0, 7.6.0-7.6.7, 7.4.1-7.4.11, 7.2.1-7.2.12
  • Fortinet FortiManager 8.0.0, 7.6.0-7.6.7, 7.4.0-7.4.11, 7.2.0-7.2.12
  • Fortinet FortiManager Cloud 8.0.0, 7.6.0-7.6.7, 7.4.1-7.4.11, 7.2.1-7.2.12

Timeline

  • 2026-11-10: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.