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    2 vulnerabilities by @socket.io

    CVE-2026-102600 (GCVE-0-2026-102600)

    Vulnerability from nvd – Published: 2026-09-29 15:23 – Updated: 2026-09-29 16:28
    VLAI
    Title
    Socket.IO: Prototype Pollution via Unsafe Client Session Lookup
    Summary
    Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 0.1.1, @socket.io/cluster-engine uses inherited object properties when looking up attacker-controlled session IDs in clustered deployments. Special property names such as __proto__ or constructor can resolve through the object prototype chain instead of identifying an actual connected client, causing the Node.js process to crash and resulting in denial of service. Applications that do not use @socket.io/cluster-engine are not affected. This issue is fixed in version 0.1.1.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-29 16:27 UTC
    CWE
    • CWE-20 - Improper Input Validation
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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      "title": "Socket.IO: Prototype Pollution via Unsafe Client Session Lookup"
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    CVE-2026-102600 (GCVE-0-2026-102600)

    Vulnerability from cvelistv5 – Published: 2026-09-29 15:23 – Updated: 2026-09-29 16:28
    VLAI
    Title
    Socket.IO: Prototype Pollution via Unsafe Client Session Lookup
    Summary
    Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 0.1.1, @socket.io/cluster-engine uses inherited object properties when looking up attacker-controlled session IDs in clustered deployments. Special property names such as __proto__ or constructor can resolve through the object prototype chain instead of identifying an actual connected client, causing the Node.js process to crash and resulting in denial of service. Applications that do not use @socket.io/cluster-engine are not affected. This issue is fixed in version 0.1.1.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-29 16:27 UTC
    CWE
    • CWE-20 - Improper Input Validation
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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