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CVE-2026-45248— Hedera Guardian Authentication Bypass Information Disclosure

Quick assessment

Affected
hashgraph 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.

Guardian是Hedera开源的一个基于策略的数字资产管理与验证平台。 Guardian 3.5.1及之前版本存在访问控制错误漏洞，该漏洞源于GET /api/v1/demo/registered-users端点存在认证绕过，可能导致未授权访问用户信息。

CVSS 5.3 · Medium EPSS 0.43% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
hashgraph guardian ≤ 3.5.1 affected
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I. Basic Information for CVE-2026-45248

Vulnerability Information
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Vulnerability Title
Hedera Guardian Authentication Bypass Information Disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
Hedera Guardian through 3.5.1 contains an authentication bypass vulnerability in the GET /api/v1/demo/registered-users endpoint that allows unauthenticated attackers to retrieve sensitive user information. Attackers can access the endpoint without providing authentication credentials to obtain usernames, Hedera DIDs, parent registry DIDs, system roles, and policy role assignments for all registered users in the system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Guardian 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Guardian是Hedera开源的一个基于策略的数字资产管理与验证平台。 Guardian 3.5.1及之前版本存在访问控制错误漏洞，该漏洞源于GET /api/v1/demo/registered-users端点存在认证绕过，可能导致未授权访问用户信息。
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
hashgraph guardian 0 ~ 3.5.1 -

II. Public POCs for CVE-2026-45248

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III. Intelligence Information for CVE-2026-45248

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Patches & Fixes for CVE-2026-45248 (1)

Vendor Advisories for CVE-2026-45248 (1)

IV. Related Vulnerabilities

Same product: guardian
Same vendor: hashgraph
Same weakness: CWE-306

V. Comments for CVE-2026-45248

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