CVE-2026-11431— Path Traversal in Altium Projects Service Allows Arbitrary File Read
Quick assessment
Affected
Altium Altium Enterprise Server
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.
Altium 365和Altium Enterprise Server都是美国Altium公司的产品。Altium 365是一个产品设计和开发平台。Altium Enterprise Server是一款本地化数据管理服务器。 Altium 365和Altium Enterprise Server存在安全漏洞，该漏洞源于Projects Service下载端点接受用户提供的路径参数且绕过验证，可能导致经过身份验证的用户从服务器文件系统读取任意文件（包括整个目录作为归档返回），包括服务配置和凭据材料，从而收集
Possible ATT&CK Techniques 2 AI
T1530 · Data from Cloud Storage T1083 · File and Directory DiscoveryAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Altium | Altium 365 | unspecified |
affected |
| Altium | Altium Enterprise Server | < 8.1.1 |
affected |
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I. Basic Information for CVE-2026-11431
Vulnerability Information
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Vulnerability Title
Path Traversal in Altium Projects Service Allows Arbitrary File Read
Source: CVE Program / CVE List V5
Vulnerability Description
A path traversal vulnerability exists in the Projects Service download endpoint shared by Altium Enterprise Server and Altium 365. An authenticated user can supply a crafted path parameter that bypasses validation, allowing arbitrary files (including entire directories returned as archives) to be read from the server filesystem.
Because the readable files include service configuration and credential material, exploitation can be used to gather information enabling further compromise. The issue can be combined with CVE-2026-11424 to reach the cloud-side endpoint. On multi-tenant Altium 365 deployments, the readable configuration could have exposed credentials shared across services. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 at the service level.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Altium 365和Altium Enterprise Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Altium 365和Altium Enterprise Server都是美国Altium公司的产品。Altium 365是一个产品设计和开发平台。Altium Enterprise Server是一款本地化数据管理服务器。 Altium 365和Altium Enterprise Server存在安全漏洞，该漏洞源于Projects Service下载端点接受用户提供的路径参数且绕过验证，可能导致经过身份验证的用户从服务器文件系统读取任意文件（包括整个目录作为归档返回），包括服务配置和凭据材料，从而收集
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 |
|---|---|---|---|---|
| Altium | Altium Enterprise Server | 0 ~ 8.1.1 | - |
|
| Altium | Altium 365 | unspecified | - |
|
II. Public POCs for CVE-2026-11431
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Altium · 2026-06-05 · 7 CVEs total
| CVE-2026-11420 | Path Traversal in Altium Enterprise Server NIS Allows Unauthenticated Arbitrary File Write | |
| CVE-2026-11429 | Path Traversal in Altium Vault ScriptsController Allows Unauthenticated Remote Code Execut | |
| CVE-2026-11423 | Path Traversal in Altium Enterprise Server Collaboration Service Allows Privilege Escalati | |
| CVE-2026-11414 | Unauthenticated File Exfiltration in Altium Enterprise Server Vault Service via Hard-coded | |
| CVE-2026-11424 | Server-Side Request Forgery in Altium Platform Design GraphQL Service Allows Information D | |
| CVE-2026-11419 | Path Traversal in Altium Enterprise Server Vault UploadController Allows Arbitrary File Wr |
IV. Related Vulnerabilities
Same product: Altium Enterprise Server
-
CVE-2026-92808
Server-Side Request Forgery in Altium Enterprise Server Unif -
CVE-2026-14439
Path Traversal in Altium Git Service Allows Remote Code Exec -
CVE-2026-11429
Path Traversal in Altium Vault ScriptsController Allows Unau -
CVE-2026-11424
Server-Side Request Forgery in Altium Platform Design GraphQ -
CVE-2026-11423
Path Traversal in Altium Enterprise Server Collaboration Ser
Same vendor: Altium
-
CVE-2026-92808
Server-Side Request Forgery in Altium Enterprise Server Unif -
CVE-2026-14439
Path Traversal in Altium Git Service Allows Remote Code Exec -
CVE-2026-11429
Path Traversal in Altium Vault ScriptsController Allows Unau -
CVE-2026-11424
Server-Side Request Forgery in Altium Platform Design GraphQ -
CVE-2026-11423
Path Traversal in Altium Enterprise Server Collaboration Ser
Same weakness: CWE-22
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V. Comments for CVE-2026-11431
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