CVE-2026-1699

critical · 10

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.

CVSS

0.5%

EPSS (exploit prob.)

43rd

EPSS percentile

2026-01-30

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-829

Affected products

Vendor	Product	Affected versions
eclipse	theia_website	< 2026-01-22

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-1699