In the Eclipse Theia Website repository, the GitHub Actions workflow .github/workflows/preview.yml used pull_request_target trigger while checking out and executing untrusted pull request code. This allowed any GitHub user to execute arbitrary code in the repository's CI environment with access to repository secrets and a GITHUB_TOKEN with extensive write permissions (contents:write, packages:write, pages:write, actions:write). An attacker could exfiltrate secrets, publish malicious packages to the eclipse-theia organization, modify the official Theia website, and push malicious code to the repository.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 03 Feb 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Eclipse
Eclipse theia
Vendors & Products Eclipse
Eclipse theia

Mon, 02 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 30 Jan 2026 10:15:00 +0000

Type Values Removed Values Added
Description In the Eclipse Theia Website repository, the GitHub Actions workflow .github/workflows/preview.yml used pull_request_target trigger while checking out and executing untrusted pull request code. This allowed any GitHub user to execute arbitrary code in the repository's CI environment with access to repository secrets and a GITHUB_TOKEN with extensive write permissions (contents:write, packages:write, pages:write, actions:write). An attacker could exfiltrate secrets, publish malicious packages to the eclipse-theia organization, modify the official Theia website, and push malicious code to the repository.
Weaknesses CWE-829
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published:

Updated: 2026-02-02T19:26:31.652Z

Reserved: 2026-01-30T09:38:43.466Z

Link: CVE-2026-1699

cve-icon Vulnrichment

Updated: 2026-02-02T19:26:28.448Z

cve-icon NVD

Status : Received

Published: 2026-01-30T10:15:56.617

Modified: 2026-01-30T10:15:56.617

Link: CVE-2026-1699

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-02T09:27:55Z

Weaknesses