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CVE-2026-11419 Altium CVE debrief

A path traversal vulnerability exists in the Altium Enterprise Server Vault Service UploadController due to improper validation of a user-controlled path component in image upload requests. An authenticated user can supply a crafted absolute path so that the configured storage root is discarded, allowing arbitrary files to be written to any location on the server filesystem writable by the service account. Because content-controlled files can be written to web-accessible directories, or used to overwrite application binaries or configuration files, this can be escalated to remote code execution, service takeover, or denial of service. Altium 365 cloud deployments are not affected, as the affected endpoint is not reachable and the cloud storage architecture mitigates the file-write primitive.

Vendor
Altium
Product
Altium Enterprise Server
CVSS
CRITICAL 9.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-07-23
Advisory published
2026-06-05
Advisory updated
2026-07-23

Who should care

Users of Altium Enterprise Server Vault Service should apply patches or mitigations to prevent exploitation of this vulnerability.

Technical summary

The vulnerability has a CVSS score of 9.4 and is classified as CRITICAL. It is caused by improper validation of user-controlled path components in image upload requests, allowing an authenticated user to write arbitrary files to any location on the server filesystem.

Defensive priority

high

Recommended defensive actions

  • Apply patches or updates provided by Altium to address the vulnerability.
  • Restrict access to the affected endpoint to only trusted users.
  • Monitor server filesystem for suspicious file writes or modifications.

Evidence notes

The CVE record and NVD detail pages provide additional information about the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11419 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11419

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11419 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11419

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://www.altium.com/platform/security-compliance/security-advisories

    4760f414-e1ae-4ff1-bdad-c7a9c3538b79

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.