CVE-2026-31982

HighCVSS 7.1/10Last modified Aug 11, 2026

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.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Weakness enumeration

CWE-601

Affected software

Vendor	Product	Versions
Nozomi Networks	Guardian	< 26.2.0
Nozomi Networks	CMC	< 26.2.0
Siemens	RUGGEDCOM APE1808	< *

References

https://security.nozominetworks.com/NN-2026:9-01Mitigation, Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-827968.html

Timeline

Published: Jul 9, 2026
Last modified: Aug 11, 2026
NVD status: Modified

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