{"id":"CVE-2026-87090","state":"PUBLISHED","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.","publishedAt":"2026-09-10T18:54:45.711Z","updatedAt":"2026-09-10T19:02:58.403Z","severity":{"score":8.3,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","source":"HashiCorp"},"assigner":"HashiCorp","products":["HashiCorp Consul","HashiCorp Consul Enterprise"],"affected":[{"vendor":"HashiCorp","product":"Consul","defaultStatus":"unaffected","versions":[{"version":"0.1.0","status":"affected","lessThan":"2.0.4","versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/consul"},{"vendor":"HashiCorp","product":"Consul Enterprise","defaultStatus":"unaffected","versions":[{"version":"0.1.0","status":"affected","lessThan":"2.0.4","changes":[{"at":"1.21.18","status":"unaffected"},{"at":"1.22.12","status":"unaffected"}],"versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/consul"}],"references":["https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/87xxx/CVE-2026-87090.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-87090","state":"PUBLISHED","datePublished":"2026-09-10T18:54:45.711Z","dateUpdated":"2026-09-10T19:02:58.403Z","assignerShortName":"HashiCorp","assignerOrgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","dateReserved":"2026-09-08T19:58:12.912Z"},"containers":{"cna":{"title":"Consul vulnerable to an authorization bypass in the catalog node-write path","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"HashiCorp","product":"Consul","defaultStatus":"unaffected","versions":[{"version":"0.1.0","status":"affected","lessThan":"2.0.4","versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/consul"},{"vendor":"HashiCorp","product":"Consul Enterprise","defaultStatus":"unaffected","versions":[{"version":"0.1.0","status":"affected","lessThan":"2.0.4","changes":[{"at":"1.21.18","status":"unaffected"},{"at":"1.22.12","status":"unaffected"}],"versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/consul"}],"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736"}],"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":{"shortName":"HashiCorp","orgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","dateUpdated":"2026-09-10T18:54:45.711Z"},"credits":[{"lang":"en","value":"This issue was reported to HashiCorp by Raphael Zanarelli."}],"impacts":[{"capecId":"CAPEC-1","descriptions":[{"lang":"en","value":"CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs"}]}],"source":{"advisory":"HCSEC-2026-34","discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-10T19:02:38.060194Z","id":"CVE-2026-87090","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-10T19:02:58.403Z"}}]}}}