CVE-2026-11431
Path Traversal in Altium Projects Service Allows Arbitrary File Read
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.
INFO
Published Date :
June 5, 2026, 10:16 p.m.
Last Modified :
July 23, 2026, 7:10 a.m.
Remotely Exploit :
Yes !
Source :
4760f414-e1ae-4ff1-bdad-c7a9c3538b79
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | 4760f414-e1ae-4ff1-bdad-c7a9c3538b79 | ||||
| CVSS 4.0 | HIGH | 4760f414-e1ae-4ff1-bdad-c7a9c3538b79 |
Solution
- Update Altium Enterprise Server to version 8.1.1 or later.
- Ensure Altium 365 is remediated at the service level.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-11431.
| URL | Resource |
|---|---|
| https://www.altium.com/platform/security-compliance/security-advisories |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-11431 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-11431
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-11431 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-11431 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: Altium 365 de Altium, Description: Una vulnerabilidad de salto de ruta existe en el endpoint de descarga del Servicio de Proyectos compartido por Altium Enterprise Server y Altium 365. Un usuario autenticado puede proporcionar un parámetro de ruta manipulado que omite la validación, permitiendo que archivos arbitrarios (incluyendo directorios completos devueltos como archivos) sean leídos del sistema de archivos del servidor. Debido a que los archivos legibles incluyen configuración del servicio y material de credenciales, la explotación puede ser utilizada para recopilar información que permita un compromiso adicional. El problema puede combinarse con CVE-2026-11424 para alcanzar el endpoint del lado de la nube. En implementaciones multi-inquilino de Altium 365, la configuración legible podría haber expuesto credenciales compartidas entre servicios. Altium Enterprise Server está corregido en 8.1.1; el problema ha sido remediado en Altium 365 a nivel de servicio. -
CVE Modified by 4760f414-e1ae-4ff1-bdad-c7a9c3538b79
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Altium', 'modules': ['Projects Service (DownloadReleaseNode action)'], 'product': 'Altium Enterprise Server', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '8.1.1', 'versionType': 'semver'}], 'platforms': ['Web'], 'defaultStatus': 'unaffected'}, {'vendor': 'Altium', 'modules': ['Projects Service (DownloadReleaseNode action)'], 'product': 'Altium 365', 'versions': [{'status': 'affected', 'version': 'unspecified'}], 'platforms': ['Web'], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-11431', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-08T13:12:24.668997Z'} -
New CVE Received by 4760f414-e1ae-4ff1-bdad-c7a9c3538b79
Jun. 05, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-22 Added CWE CWE-200 Added Reference https://www.altium.com/platform/security-compliance/security-advisories