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CVE-2026-87090

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

CVSS 3.1 8.3 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-87090

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-87090

Published

Consul

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "platforms": [
                        "64 bit",
                        "32 bit",
                        "x86",
                        "ARM",
                        "MacOS",
                        "Windows",
                        "Linux"
                    ],
                    "product": "Consul",
                    "repo": "https://github.com/hashicorp/consul",
                    "vendor": "HashiCorp",
                    "versions": [
                        {
                            "lessThan": "2.0.4",
                            "status": "affected",
                            "version": "0.1.0",
                            "versionType": "semver"
                        }
                    ]
                }

Consul Enterprise

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "platforms": [
                        "64 bit",
                        "32 bit",
                        "x86",
                        "ARM",
                        "MacOS",
                        "Windows",
                        "Linux"
                    ],
                    "product": "Consul Enterprise",
                    "repo": "https://github.com/hashicorp/consul",
                    "vendor": "HashiCorp",
                    "versions": [
                        {
                            "changes": [
                                {
                                    "at": "1.21.18",
                                    "status": "unaffected"
                                },
                                {
                                    "at": "1.22.12",
                                    "status": "unaffected"
                                }
                            ],
                            "lessThan": "2.0.4",
                            "status": "affected",
                            "version": "0.1.0",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON