Critical vulnerabilities in Fortinet CVE-2025-59718, CVE-2025-59719, CVE-2026-24858 exploited in the wild

Overview Update for CVE-2026-24858: On January 27, 2026, Fortinet disclosedCVE-2026-24858 , a critical unauthenticated vulnerability allowing authentication bypass via Fortinet’s cloud SSO. Confirmed as a net-new vulnerability rather than a patch bypass, it has beenobserved under active zero-day...

VulnCheck KEV: CVE-2025-59718

Fortinet FortiOS, FortiSwitchMaster, FortiProxy, and FortiWeb contain an improper verification of cryptographic signature vulnerability that may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML message. Please be aware that CVE-2025-59719...

CVE-2025-54369

Node-SAML is a SAML library not dependent on any frameworks that runs in Node. In versions 5.0.1 and below, Node-SAML loads the assertion from the unsigned original response document. This is different than the parts that are verified when checking signature. This allows an attacker to modify...

Authentication Bypass

ruby-saml is vulnerable to authentication bypass. The vulnerability is due to improper handling of libxml2 canonicalization in Nokogiri when processing invalid XML, which returns an empty string used for DigestValue calculation, allowing an attacker to perform a Signature Wrapping attack and bypa...

Authentication Bypass

ruby-saml is vulnerable to authentication bypass. The vulnerability is due to inconsistent XML parsing between REXML and Nokogiri resulting in different document structures, which allows an attacker to perform a Signature Wrapping attack and bypass authentication...

CVE-2025-54369 Node-SAML SAML Authentication Bypass

Node-SAML is a SAML library not dependent on any frameworks that runs in Node. In versions 5.0.1 and below, Node-SAML loads the assertion from the unsigned original response document. This is different than the parts that are verified when checking signature. This allows an attacker to modify...

CVE-2025-54369: Improper Neutralization of Alternate XSS Syntax

Node-SAML is a SAML library not dependent on any frameworks that runs in Node. In versions 5.0.1 and below, Node-SAML loads the assertion from the unsigned original response document. This is different than the parts that are verified when checking signature. This allows an attacker to modify...

Linux Distros Unpatched Vulnerability : CVE-2025-66567

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The ruby-saml library is for implementing the client side of a SAML authorization. ruby-saml versions up to and including 1.12.4 contain an authentication bypas...

Linux Distros Unpatched Vulnerability : CVE-2025-66568

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The ruby-saml library implements the client side of an SAML authorization. Versions up to and including 1.12.4, are vulnerable to authentication bypass through...

CVE-2025-59719

An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message...

CVE-2025-66568

The ruby-saml library implements the client side of an SAML authorization. Versions up to and including 1.12.4, are vulnerable to authentication bypass through the libxml2 canonicalization process used by Nokogiri for document transformation, which allows an attacker to execute a Signature Wrappi...

The vulnerabilities of the FortiCloud SSO authentication function in FortiOS operating systems, FortiWeb web applications at the network layer, FortiProxy proxy servers for protecting against internet attacks, and the local management platform FortiSwitchManager, allow attackers to bypass existing security mechanisms.

The vulnerability of the FortiCloud SSO authentication function in FortiOS operating systems, FortiWeb web applications, FortiProxy proxy servers for protecting against internet attacks, and the local management platform FortiSwitchManager is related to deficiencies in the mechanism for verifying...

EUVD-2025-202191

An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message...

CVE-2025-59719

An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message...

CVE-2025-59719

An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message...

SAML PHP Toolkit Vulnerability on xmlseclibs CVE-2025-66475

Summary There is a critical vulnerability on xmlseclibs CVE-2025-66475, a dependency of php-saml Update to the following versions of php-saml which forces the use of patched versions of xmlseclibs: - 2.21.1 - 3.8.1 - 4.3.1 Impact Signature Wrapping Vulnerabilities allows an attacker to impersonat...

GHSA-5J8P-438X-RGG5 SAML PHP Toolkit Vulnerability on xmlseclibs CVE-2025-66475

Summary There is a critical vulnerability on xmlseclibs CVE-2025-66475, a dependency of php-saml Update to the following versions of php-saml which forces the use of patched versions of xmlseclibs: - 2.21.1 - 3.8.1 - 4.3.1 Impact Signature Wrapping Vulnerabilities allows an attacker to impersonat...

CVE-2025-59718

CVE-2025-59718/59719 describe an improper verification of cryptographic signatures that allows an unauthenticated attacker to bypass Fortinet FortiCloud SSO login via a crafted SAML response. Affected products span FortiOS (multiple versions up to 7.6.3, and earlier lines listed), FortiProxy, For...

CVE-2025-59719

An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message...

CVE-2025-66567

The ruby-saml library is for implementing the client side of a SAML authorization. ruby-saml versions up to and including 1.12.4 contain an authentication bypass vulnerability due to an incomplete fix for CVE-2025-25292. ReXML and Nokogiri parse XML differently, generating entirely different...