CVE-2026-1699

State: Published
Severity: 10.0 Critical
Published: Jan 30, 2026
Updated: Feb 2, 2026
Reserved: Jan 30, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	10.0 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	eclipse

Weaknesses

CWE-829 Inclusion of Functionality from Untrusted Control Sphere

Affected Products

Product	Versions
Eclipse Theia - WebsiteEclipse Foundation	before 2fb0cc4bfc372cfaef79feb4eebb6563778b2560Affected

References

https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/332

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