CVE-2026-1699

Unprotected GitHub Actions Allows Arbitrary Code Execution with Repository Secrets

Published Jan 30, 2026 CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Unprotected GitHub Actions Allows Arbitrary Code Execution with Repository Secrets
Type Values Removed Values Added
First Time appeared Eclipse theia Website
CPEs cpe:2.3:a:eclipse:theia_website:*:*:*:*:*:*:*:*
Vendors & Products Eclipse theia Website
Type Values Removed Values Added
First Time appeared Eclipse
Eclipse theia
Vendors & Products Eclipse
Eclipse theia
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
eclipse
Published
Updated
Feb 2, 2026, 7:26 PM
Reserved
Jan 30, 2026, 9:38 AM
Status
Analyzed
Published
Jan 30, 2026, 10:15 AM
Modified
Jun 17, 2026, 10:16 AM