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    CVE-2026-73213

    Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, addr_less_eq() in src/client/ns_turn_ioaddr.c uses a component-wise comparison for native IPv6 min-max intervals in ioa_addr_in_range(), allowing an authenticated TURN client to relay to an IPv6 peer that is numerically within a configured non-prefix-aligned denied-peer-ip range but is classified as outside it. This issue is fixed in version 4.16.0.

    Published:Aug 11, 2026
    Last Modified:Aug 13, 2026
    EPS:Aug 11, 2026
    EPSS Score:0.00303
    CVSS Score:5.8

    Affected Products

    Vendor
    Coturn
    Product
    Coturn

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-68555 (CVSS 6.5) — Coturn is a free open source implementation of TURN and STUN Server. In 4.15.0, an authenticated TURN user can…
    CVE-2026-68552 (CVSS 5.3) — Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, an unauthenticated remot…
    CVE-2026-68554 (CVSS 2.3) — Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, an on-path attacker can …
    CVE-2026-68553 (CVSS 7.1) — Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, an authenticated TURN us…
    CVE-2026-73216 (CVSS 6.5) — Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, shutdown_client_connecti…
    CVE-2026-73215 (CVSS 7.1) — Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even(…
    CVE-2026-73214 (CVSS 8.2) — Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, dtls_server_input_handle…
    CVE-2026-73212 (CVSS 5.8) — Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, good_peer_addr() in src/…
    CVE-2026-65981 (CVSS 7.1) — Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, a server using --mobilit…
    CVE-2026-62959 (CVSS 8.2) — Coturn is a free open source implementation of TURN and STUN Server. From 4.5.2 through 4.14.0, when Coturn is…

    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