CVE-2026-87107

Consul vulnerable to an authorization bypass in the catalog deregistration path

CVSS 3.1 5.4 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-87107

Published

Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog deregistration path that may allow a local ACL token to delete peer-imported catalog objects. A caller with {{service:write}} or {{node:write}} permission may exploit this issue to remove services, checks, or nodes imported from a peered cluster without holding authority over the peer origin. This vulnerability (CVE-2026-87107) 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-2026-87107

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": "1.21.0",
                            "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": "1.21.0",
                            "versionType": "semver"
                        }
                    ]
                }

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