CVE search · CVE-2026-14574
CVE-2026-14574
medium 5.7
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.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- emo@eclipse.org
- Weakness
- CWE-1321
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 4.0 | medium 5.7 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:L/VI:H/VA:L/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
emo@eclipse.orgSecondary |
| CVSS 3.1 | medium 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
nvd@nist.govPrimary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- eclipse · theia
References
- https://github.com/eclipse-theia/theia/security/advisories/GHSA-f3w9-qfw3-xr32Broken Link
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/157Vendor Advisory
- https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/567ExploitMitigationVendor AdvisoryIssue Tracking
- https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/567ExploitMitigationVendor Advisory