CVE-2026-87106

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    CVE-2026-87106

    Published: 10 Sept 2026Last Modified: 11 Sept 2026

    Summary: Consul vulnerable to a denial of service in the native RPC listener

    Details: Consul and Consul Enterprise are vulnerable to a denial of service in the native RPC listener that may allow an authenticated client to exhaust server memory before ACL authorization is evaluated. A client that can complete the internal RPC mTLS handshake may exploit this issue without holding a valid ACL token. This vulnerability (CVE-2026-87106) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

    References: https://discuss.hashicorp.com/t/hcsec-2026-35-consul-vulnerable-to-a-denial-of-service-in-the-native-rpc-listener/77737, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87106.json, https://github.com/hashicorp/consul, https://nvd.nist.gov/vuln/detail/CVE-2026-87106

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 4e96098f98228a6b91691abefced6493128d57ea
    Fixed -a3eb721c21d4c1ff4baabf84da60158f374f8907

    Affected versions

    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-2026-87106 | CVE-DB