CVE-2026-11431Network attack vector

Authenticated file disclosure via unvalidated download path

Published Jun 5, 2026 · Updated Jun 5, 2026

Path traversal in Altium 365 and Enterprise Server allows remote authenticated users to read arbitrary server files through a crafted path. The Projects Service DownloadReleaseNode action fails to confine its path parameter to the intended directory, returning arbitrary files and whole directories as archives. Direct exploitation requires an authenticated workspace account; exposed configuration and credential material can enable further service or server compromise.

CVSS severity8.3
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Altium 365 and Enterprise Server allows remote authenticated users to read arbitrary server files through a crafted path. The Projects Service DownloadReleaseNode action fails to confine its path parameter to the intended directory, returning arbitrary files and whole directories as archives. Direct exploitation requires an authenticated workspace account; exposed configuration and credential material can enable further service or server compromise.

The record

CVE
CVE-2026-11431
Published
Jun 5, 2026
Updated
Jun 5, 2026
Vendor
Altium
Product
Altium 365
Classifications
CWE-200, CWE-22, T1005, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Altium · Altium 365version=unspecified
Altium · Altium On-Prem Enterprise Serverversion=0 <8.1.1

Published CVSS scores

8.3AltiumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System
T1552.001Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo