What is CVE-2026-1699?

CVE-2026-1699 is a critical-severity vulnerability in Eclipse Theia_website, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 10.0/10. Published 2026-01-30.

How severe is CVE-2026-1699?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Vulnerability in Eclipse Theia_website

CVE-2026-1699

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 arbit…

EPSS: 0.005 (39.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Eclipse Theia_website
Eclipse Foundation Theia - Website — versions 0

Weakness classification (CWE)

CWE-829 — Inclusion of Functionality from Untrusted Control Sphere

References

emo@eclipse.org (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2026-1699?: CVE-2026-1699 is a critical-severity vulnerability in Eclipse Theia_website, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 10.0/10. Published 2026-01-30.
How severe is CVE-2026-1699?: Critical severity. CVSS v3 base score is 10.0 out of 10.