Phishing via poisoned SAML redirect cache
Published Jul 9, 2026 · Updated Jul 9, 2026
Open redirect in Nozomi Networks Guardian and Central Management Console before 26.2.0 allows remote attackers to redirect SAML users. The SAML sign-in endpoint accepts an insufficiently validated redirection parameter and stores its value in a shared redirect cache. No authentication is required to poison the cache, but another user must subsequently initiate SAML sign-on; that user can reach a phishing site, expose credentials, or encounter failed authentication.
Summary
What happened
Open redirect in Nozomi Networks Guardian and Central Management Console before 26.2.0 allows remote attackers to redirect SAML users. The SAML sign-in endpoint accepts an insufficiently validated redirection parameter and stores its value in a shared redirect cache. No authentication is required to poison the cache, but another user must subsequently initiate SAML sign-on; that user can reach a phishing site, expose credentials, or encounter failed authentication.
The record
- CVE
- CVE-2026-31982
- Published
- Jul 9, 2026
- Updated
- Jul 9, 2026
- Vendor
- Nozomi Networks
- Product
- Guardian
- Classifications
- CWE-601, CAPEC-194, T1056.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 9, 2026CVE publishedPublication date reported by the CVE source.
- Jul 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <26.2.0
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What is affected?
Published CVSS scores
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Attacks
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