What’s Vulnerable › Vulnerabilities

CVE-2026-31982: Open Redirect in SAML Single Sign-On in Guardian/CMC before 26.2.0

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-08-11
• Weakness: CWE-601

Description

An Open Redirect vulnerability was discovered in the SAML Single Sign-On functionality due to insufficient validation of a user-controlled redirection parameter. An unauthenticated attacker can craft a request to the SAML sign-in endpoint and poison the cached SAML redirection for other users who subsequently initiate SAML Single Sign-On, enabling phishing and credential-theft attacks, as well as disrupting SAML authentication for all affected users.

Affected products

• Nozomi Networks CMC: before 26.2.0 — fixed in 26.2.0
• Nozomi Networks Guardian: before 26.2.0 — fixed in 26.2.0

How to fix

Upgrade to a fixed version: Nozomi Networks CMC 26.2.0; Nozomi Networks Guardian 26.2.0. Check the vendor advisory for mitigations.

References

• https://security.nozominetworks.com/NN-2026:9-01
• https://cert-portal.siemens.com/productcert/html/ssa-827968.html

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