CVE-2026-62863

    Dashboard / Vulnerabilities / CVE-2026-62863

    CVE-2026-62863

    Published: 30 Oct 2026Last Modified: 8 Nov 2026

    Summary: MoLing: unauthenticated SSE and wildcard CORS expose tool sessions

    Details: MoLing is a computer-use and browser-use based MCP server. Prior to 0.5.0, when MoLing runs in SSE mode using `-l`, its `/sse` and `/message` HTTP endpoints do not authenticate requests and the `mcp-go` dependency sets `Access-Control-Allow-Origin: *`. A malicious web page can open a cross-origin `EventSource` to `/sse`, including a loopback listener, and read the `endpoint` event to obtain `sessionId`. After a victim running SSE mode visits that page, the attacker can use the disclosed `sessionId` against `/message` to send unauthorized MCP tool calls. Depending on the configured tools, those calls can read or write local files, execute commands or perform other actions. Binding only to loopback does not prevent this browser-mediated attack. This issue is fixed in version 0.5.0.

    References: https://github.com/gojue/moling/releases/tag/v0.5.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62863.json, https://github.com/gojue/moling/security/advisories/GHSA-qpgh-hp5g-4vwp, https://nvd.nist.gov/vuln/detail/CVE-2026-62863, https://github.com/gojue/moling/commit/ae07f704cbc88d4419fc0fbaec278090fcd0502d, https://github.com/gojue/moling/pull/48

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -ae07f704cbc88d4419fc0fbaec278090fcd0502d

    Affected versions

    v0.4.0

    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
    CVE-2026-62863 | CVE-DB