CVE-2026-31982
Open Redirect in SAML Single Sign-On in Guardian/CMC before 26.2.0
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jul 9, 2026
- Updated
- Aug 11, 2026
- Reserved
- Mar 10, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L | Nozomi |
| 3.1 | 7.1 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L | Nozomi |
Weaknesses
- CWE-601 URL redirection to untrusted site ('open redirect')
Affected Products
| Product | Versions |
|---|---|
GuardianNozomi Networks |
|
CMCNozomi Networks |
|
References
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