CVE Feed

    Dashboard / CVE / CVE-2026-14574

    CVE-2026-14574

    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.

    Published:Aug 5, 2026
    Last Modified:Aug 5, 2026
    EPS:Aug 5, 2026
    EPSS Score:
    CVSS Score:5.7

    Affected Products

    Vendor
    Eclipse
    Product
    Theia

    Exploits

    https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/567https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/567

    Related CVEs

    CVE-2026-19884 (CVSS 8.4) — In Eclipse Theia versions up to and including 1.69.0, opening a folder starts source control integration witho…
    CVE-2026-61891 (CVSS 7.5) — In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend exposes HTTP file-downlo…
    CVE-2026-60009 (CVSS 8.8) — In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend binds `POST /file-upload…
    CVE-2026-10055 (CVSS 8.5) — In Eclipse Theia since version 1.26.0, the backend /services/request-service RPC accepts an attacker-controlle…
    CVE-2026-10054 (CVSS 8.8) — In affected versions of Eclipse Theia (1.8.1 and later), the browser backend exposes privileged terminal RPC o…
    CVE-2026-44691 (CVSS 8.4) — In Eclipse Theia versions prior to 1.69.0, custom task definitions in workspace files (e.g. .theia/tasks.json,…
    CVE-2026-22551 (CVSS 6.7) — In Eclipse Theia versions prior to 1.71.0, the AI chat rendered Markdown image tags from AI responses, trigger…
    CVE-2026-46580 (CVSS 8.4) — In Eclipse Theia versions prior to 1.71.0, files matching the pattern .prompts/*.prompttemplate in a workspace…
    CVE-2026-44688 (CVSS 8.4) — In Eclipse Theia versions prior to 1.71.0, the AI chat agent processed workspace file and directory names as p…
    CVE-2026-1699 (CVSS 10) — In the Eclipse Theia Website repository, the GitHub Actions workflow .github/workflows/preview.yml used pull_r…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High