CVE-2026-122126

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    CVE-2026-122126

    Published: 4 Nov 2026Last Modified: 7 Nov 2026

    Summary: reSIProcate reTurn client through 1.14.0 Heap Buffer Overflow via TurnTcpSocket

    Details: reSIProcate reTurn client through 1.14.0 contains a heap buffer overflow in TurnTcpSocket::handleReadHeader(), which TurnTlsSocket inherits, that allows malicious TURN servers or on-path attackers to overwrite memory via oversized frame lengths. Attackers can send STUN or ChannelData frames declaring up to 65535 bytes, writing roughly 57 KB past the fixed 8192-byte mReadBuffer and crashing the client. Only the synchronous TCP and TLS client is affected; the asynchronous client (TurnAsyncSocket) and the reTurn server are not.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122126.json, https://nvd.nist.gov/vuln/detail/CVE-2026-122126, https://www.vulncheck.com/advisories/resiprocate-return-client-through-1.14.0-heap-buffer-overflow-via-turntcpsocket, https://github.com/resiprocate/resiprocate/commit/5bb559fd96298073cab369fdfa610f981fb01e95, https://github.com/resiprocate/resiprocate/pull/496, https://github.com/resiprocate/resiprocate, https://github.com/resiprocate/resiprocate/blob/resiprocate-1.14.0/reTurn/client/TurnTcpSocket.cxx#L124-L147

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -5bb559fd96298073cab369fdfa610f981fb01e95

    Affected versions

    resiprocate-1.12.0_beta9
    resiprocate-1.12.0_beta8
    resiprocate-1.12.0_beta7
    resiprocate-1.12.0_beta6
    resiprocate-1.12.0_beta5
    resiprocate-1.12.0_beta1
    resiprocate-1.12.0_alpha1

    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-2026-122126 | CVE-DB