CVE-2026-14574

6.5 MEDIUMpublic exploit available

Published 2026-08-05 · Updated 2026-08-07

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

In Eclipse Theia versions 0.7.0 and up until including 1.73.1, the `PreferenceUtils.merge` function in `@theia/core` recursively merges preference values without rejecting prototype-related keys (`__proto__`, `constructor`, `prototype`). Because this function is invoked by `PreferenceServiceImpl.doResolve` for every preference resolution across scopes (default, user, workspace, folder), a crafted preference value in a workspace settings file (`.theia/settings.json` or `.vscode/settings.json`) can pollute `Object.prototype` when the user opens the workspace, potentially altering application logic across the Theia process.

CVSS vector

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

Weaknesses

CWE-1321

Vendors

eclipse

Products

theia

Public exploit & PoC references

https://github.com/eclipse-theia/theia/security/advisories/GHSA-f3w9-qfw3-xr32[Broken Link]
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/567[Exploit, Mitigation, Vendor Advisory, Issue Tracking]
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/567[Exploit, Mitigation, Vendor Advisory]

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.