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    CVE-2026-58210

    NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an unauthenticated MQTT client could cause the server to retain large incomplete MQTT CONNECT packets before authentication completed, consuming server memory while the parser waited for the advertised MQTT packet length. This issue is fixed in versions 2.14.3 and 2.12.12.

    Published:Jul 8, 2026
    Last Modified:Jul 10, 2026
    EPS:Jul 8, 2026
    EPSS Score:0.00732
    CVSS Score:7.5

    Affected Products

    Vendor
    Nats
    Product
    Nats Server

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-58208 (CVSS 6.8) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58211 (CVSS 5.4) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58207 (CVSS 7.7) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58209 (CVSS 4.3) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58214 (CVSS 4.3) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58254 (CVSS 5.3) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58213 (CVSS 7.1) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58250 (CVSS 7.5) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58252 (CVSS 6.5) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…
    CVE-2026-58253 (CVSS 8.8) — NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.1…

    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