# 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.

CVE record · `CVE-2026-1699`

- **Identifiers:** `CVE-2026-1699`
- **State:** Confirmed
- **Severity:** CVSS 10.0 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** eclipse
- **Weakness (CWE):** [CWE-829](https://cwe.mitre.org/data/definitions/829.html)
- **Tags:** [CWE-829](https://agentprime.io/advisories/tag/cwe-829.md)
- **Technologies:** [Eclipse Foundation Eclipse Theia - Website](https://agentprime.io/advisories/technology/eclipse-foundation-eclipse-theia-website.md)
- **Published:** 30 Jan 2026
- **Updated:** 2 Feb 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: eclipse) at 30 Jan 2026, 09:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- CVSS score 10.0: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Eclipse Foundation. Product: Eclipse Theia - Website.
  - affected: `before 2fb0cc4bfc372cfaef79feb4eebb6563778b2560` (git)
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 10.0 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`, from CNA (eclipse)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0055, the 46th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 30 Jan 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-1699](https://www.cve.org/CVERecord?id=CVE-2026-1699)
- [NVD: CVE-2026-1699](https://nvd.nist.gov/vuln/detail/CVE-2026-1699)

### References from the CNA

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

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-1699>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-1699/>. Everything for agents: <https://agentprime.io/llms.txt>.