CVE-2026-31982: CWE-601 URL redirection to untrusted site ('open redirect') in Nozomi Networks Guardian
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.
AI Analysis
Technical Summary
This vulnerability (CWE-601) in Nozomi Networks Guardian's SAML Single Sign-On allows an attacker to manipulate the redirection parameter without proper validation. By sending a crafted request to the SAML sign-in endpoint, the attacker can poison the cached redirection URL used by other users, causing them to be redirected to untrusted sites. This can facilitate phishing, credential theft, and denial of service against SAML authentication for affected users. The vulnerability is unauthenticated and has a CVSS 4.0 base score of 5.3 (medium severity). No patch or official remediation information is currently available. The product is not a cloud service, and no known exploits are reported in the wild.
Potential Impact
An unauthenticated attacker can cause users of Nozomi Networks Guardian's SAML Single Sign-On to be redirected to malicious sites. This can lead to phishing attacks, credential theft, and disruption of SAML authentication for all users relying on the poisoned cached redirection. The vulnerability affects the integrity and availability of the authentication process.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should be cautious of unexpected redirects during SAML Single Sign-On and consider additional monitoring or controls around SAML authentication flows as appropriate.
CVE-2026-31982: CWE-601 URL redirection to untrusted site ('open redirect') in Nozomi Networks Guardian
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.
CVSS v4.0
Score 5.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-601) in Nozomi Networks Guardian's SAML Single Sign-On allows an attacker to manipulate the redirection parameter without proper validation. By sending a crafted request to the SAML sign-in endpoint, the attacker can poison the cached redirection URL used by other users, causing them to be redirected to untrusted sites. This can facilitate phishing, credential theft, and denial of service against SAML authentication for affected users. The vulnerability is unauthenticated and has a CVSS 4.0 base score of 5.3 (medium severity). No patch or official remediation information is currently available. The product is not a cloud service, and no known exploits are reported in the wild.
Potential Impact
An unauthenticated attacker can cause users of Nozomi Networks Guardian's SAML Single Sign-On to be redirected to malicious sites. This can lead to phishing attacks, credential theft, and disruption of SAML authentication for all users relying on the poisoned cached redirection. The vulnerability affects the integrity and availability of the authentication process.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should be cautious of unexpected redirects during SAML Single Sign-On and consider additional monitoring or controls around SAML authentication flows as appropriate.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Nozomi
- Date Reserved
- 2026-03-10T16:14:03.266Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4f598968715ace43f21a78
Added to database: 07/09/2026, 08:19:21 UTC
Last enriched: 08/11/2026, 13:18:14 UTC
Last updated: 08/23/2026, 22:52:10 UTC
Views: 40
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