by Kastro
Paper/Archive/CVE-2026-1699

CVE-2026-1699

Eclipse Foundation Eclipse Theia - Website — In the Eclipse Theia Website repository, the GitHub Actions workflow .github/workflows/preview.yml used pull_request_target trigger while…

EPSS 0.6%public exploitCVSS 10.0
critical.is priorityof 100
49
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 46.1.461 × 209.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Eclipse Theia - Website< 2fb0cc4bfc372cfaef79feb4eebb6563778b25602fb0cc4bfc372cfaef79feb4eebb6563778b2560CNA

Scores by source

eclipse (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refgitlab.eclipse.org/security/vulnerability-reports/-/issues/332