{"api_version":"1","generated_at":"2026-09-10T23:40:32+00:00","cve":"CVE-2026-87090","urls":{"html":"https://cve.report/CVE-2026-87090","api":"https://cve.report/api/cve/CVE-2026-87090.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-87090","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-87090"},"summary":{"title":"Consul vulnerable to an authorization bypass in the catalog node-write path","description":"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.","state":"PUBLISHED","assigner":"HashiCorp","published_at":"2026-09-10 19:17:37","updated_at":"2026-09-10 19:45:14"},"problem_types":["CWE-863","CWE-863 CWE-863: Incorrect Authorization"],"metrics":[{"version":"3.1","source":"security@hashicorp.com","type":"Secondary","score":"8.3","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","baseScore":8.3,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"8.3","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","data":{"baseScore":8.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736","name":"https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736","refsource":"security@hashicorp.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87090","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87090","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"HashiCorp","product":"Consul","version":"affected 0.1.0 2.0.4 semver","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"]},{"source":"CNA","vendor":"HashiCorp","product":"Consul Enterprise","version":"affected 0.1.0 2.0.4 semver","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"This issue was reported to HashiCorp by Raphael Zanarelli.","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-87090","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-09-10T19:02:38.060194Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-09-10T19:02:58.403Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"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"}]},{"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"}]}],"credits":[{"lang":"en","value":"This issue was reported to HashiCorp by Raphael Zanarelli."}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"

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.


"}],"value":"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."}],"impacts":[{"capecId":"CAPEC-1","descriptions":[{"lang":"en","value":"CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs"}]}],"metrics":[{"cvssV3_1":{"baseScore":8.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-10T18:54:45.711Z","orgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","shortName":"HashiCorp"},"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736"}],"source":{"advisory":"HCSEC-2026-34","discovery":"EXTERNAL"},"title":"Consul vulnerable to an authorization bypass in the catalog node-write path"}},"cveMetadata":{"assignerOrgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","assignerShortName":"HashiCorp","cveId":"CVE-2026-87090","datePublished":"2026-09-10T18:54:45.711Z","dateReserved":"2026-09-08T19:58:12.912Z","dateUpdated":"2026-09-10T19:02:58.403Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-10 19:17:37","lastModifiedDate":"2026-09-10 19:45:14","problem_types":["CWE-863","CWE-863 CWE-863: Incorrect Authorization"],"metrics":{"cvssMetricV31":[{"source":"security@hashicorp.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","baseScore":8.3,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-10T19:02:38.060194Z","id":"CVE-2026-87090","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"87090","Ordinal":"1","Title":"Consul vulnerable to an authorization bypass in the catalog node","CVE":"CVE-2026-87090","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"87090","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Consul vulnerable to an authorization bypass in the catalog node"}]}}}