CVE-2021-43826

    Dashboard / Vulnerabilities / CVE-2021-43826

    CVE-2021-43826

    Published: 22 Feb 2022Last Modified: 7 Aug 2026

    Summary:

    Details: Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions of Envoy a crash occurs when configured for :ref:`upstream tunneling <envoy_v3_api_field_extensions.filters.network.tcp_proxy.v3.TcpProxy.tunneling_config>` and the downstream connection disconnects while the the upstream connection or http/2 stream is still being established. There are no workarounds for this issue. Users are advised to upgrade.

    References: https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf, https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -a79ca225f1ed924b855dff8a26bd7f7cdb84e694

    Affected versions

    v1.21.0

    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-2021-43826 | CVE-DB