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

Quick assessment

Affected
Nozomi Networks Guardian
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nozomi Networks Guardian是美国Nozomi Networks公司的网络安全产品。 Nozomi Networks Guardian 26.2.0之前版本和Nozomi Networks CMC 26.2.0之前版本存在输入验证错误漏洞，该漏洞源于SAML单点登录功能中对用户控制的重定向参数验证不足，可能导致未经身份验证的攻击者构造恶意请求并向其他用户缓存SAML重定向信息，从而发起钓鱼和凭据窃取攻击，并破坏所有受影响用户的SAML身份验证。

CVSS 7.1 · High EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
Nozomi Networks CMC < 26.2.0 affected
Nozomi Networks Guardian < 26.2.0 affected
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I. Basic Information for CVE-2026-31982

Vulnerability Information
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Vulnerability Title
Open Redirect in SAML Single Sign-On in Guardian/CMC before 26.2.0
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Nozomi Networks Guardian 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nozomi Networks Guardian是美国Nozomi Networks公司的网络安全产品。 Nozomi Networks Guardian 26.2.0之前版本和Nozomi Networks CMC 26.2.0之前版本存在输入验证错误漏洞，该漏洞源于SAML单点登录功能中对用户控制的重定向参数验证不足，可能导致未经身份验证的攻击者构造恶意请求并向其他用户缓存SAML重定向信息，从而发起钓鱼和凭据窃取攻击，并破坏所有受影响用户的SAML身份验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Nozomi Networks Guardian 0 ~ 26.2.0 -
Nozomi Networks CMC 0 ~ 26.2.0 -

II. Public POCs for CVE-2026-31982

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III. Intelligence Information for CVE-2026-31982

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Vendor Advisories for CVE-2026-31982 (1)

Same Patch Batch · Nozomi Networks · 2026-07-09 · 6 CVEs total

CVE-2026-31985 8.1 HIGH Disabled and non-configurable TLS certificate validation in n2os-tui when connecting the R
CVE-2026-33390 8.1 HIGH Incorrect privilege assignment for Arc sensors in Guardian/CMC before 26.2.0
CVE-2026-31984 7.5 HIGH DoS through oversized audit log entries in Guardian/CMC before 26.2.0
CVE-2026-31981 5.9 MEDIUM HTML injection in Diagram tab and Graph view in Guardian/CMC before 26.2.0
CVE-2026-31983 5.3 MEDIUM Missing authentication in SSH keys synchronization endpoint in Guardian/CMC before 26.2.0

IV. Related Vulnerabilities

Same product: Guardian
Same vendor: Nozomi Networks
Same weakness: CWE-601