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CVE-2026-44595— Yamcs: Unauthorized user enumeration via IAM API endpoints

CVSS 4.3 · Medium EPSS 0.98% · P59

Public Exploits 1

ExploitDB · 1 EDB-52604 [webapps]

Affected Version Matrix 1

VendorProductVersion RangeStatus
yamcsyamcs< 5.12.7affected
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I. Basic Information for CVE-2026-44595

Vulnerability Information
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Vulnerability Title
Yamcs: Unauthorized user enumeration via IAM API endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
Yamcs is a mission control framework. Prior to 5.12.7, the IAM API endpoints listUsers, getUser, listGroups, and getGroup in yamcs-core did not enforce the required SystemPrivilege.ControlAccess check in yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java, so any authenticated user, even one with low or no privileges, could enumerate all user accounts in the system including their usernames, superuser status, and group memberships. This issue is fixed in versions 5.12.7 and 5.13.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Yamcs 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Yamcs是Yamcs开源的一个开源软件框架。用于指挥和控制航天器、卫星、有效载荷、地面站和地面设备。 Yamcs存在安全漏洞，该漏洞源于允许枚举用户。
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

VendorProductAffected VersionsCPESubscribe
yamcsyamcs < 5.12.7 -

II. Public POCs for CVE-2026-44595

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III. Intelligence Information for CVE-2026-44595

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Patches & Fixes for CVE-2026-44595 (2)

Vendor Advisories for CVE-2026-44595 (1)

Vendor Pages for CVE-2026-44595 (2)

Same Patch Batch · yamcs · 2026-07-16 · 6 CVEs total

CVE-2026-465629.8 CRITICALYamcs: Remote Code Execution via Mission Database algorithm override
CVE-2026-466219.1 CRITICALYamcs: Authenticated Remote Code Execution (RCE) via Jython Algorithm Code Injection
CVE-2026-446329.1 CRITICALYamcs: Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithm
CVE-2026-445966.5 MEDIUMYamcs: No Rate Limiting on Authentication Endpoint
CVE-2026-555484.3 MEDIUMYamcs: Insecure Direct Object Reference (IDOR) in PacketsApi allows unprivileged users to

IV. Related Vulnerabilities

Same product: yamcs
Same vendor: yamcs
Same weakness: CWE-862

V. Comments for CVE-2026-44595

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