CVE-2026-87090

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    CVE-2026-87090

    Published: 10 Sept 2026Last Modified: 11 Sept 2026

    Summary: Consul vulnerable to an authorization bypass in the catalog node-write path

    Details: Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog node-write path that may allow an authenticated attacker to delete another node's catalog registration and take over its node identity. An attacker with a token granting node-write permission on any single node name may exploit this issue if they can obtain the node ID of a node they do not control. This vulnerability (CVE-2026-87090) 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-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87090.json, https://github.com/hashicorp/consul, https://nvd.nist.gov/vuln/detail/CVE-2026-87090

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 9772693e4ddef3b388546c27511129ac5c39cf65
    Fixed -a3eb721c21d4c1ff4baabf84da60158f374f8907

    Affected versions

    api/v1.34.3

    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-2026-87090 | CVE-DB