{"id":"CVE-2026-6959","state":"PUBLISHED","title":"Nomad vulnerable to arbitrary file read/write on client host through symlink attack","description":"HashiCorp Nomad and Nomad Enterprise prior to 2.0.1 are vulnerable to arbitrary file read and write on the client host as the Nomad process user through a symlink attack. This vulnerability (CVE-2026-6959) is fixed in Nomad 2.0.1, 1.11.5 and 1.10.11.","publishedAt":"2026-05-12T18:59:09.029Z","updatedAt":"2026-05-12T20:16:15.200Z","severity":{"score":6,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N","source":"HashiCorp"},"assigner":"HashiCorp","products":["HashiCorp Nomad","HashiCorp Nomad Enterprise"],"affected":[{"vendor":"HashiCorp","product":"Nomad","defaultStatus":"unaffected","versions":[{"version":"0.9.0","status":"affected","lessThan":"2.0.1","versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/nomad"},{"vendor":"HashiCorp","product":"Nomad Enterprise","defaultStatus":"unaffected","versions":[{"version":"0.9.0","status":"affected","lessThan":"2.0.1","changes":[{"at":"1.11.5","status":"unaffected"},{"at":"1.10.11","status":"unaffected"}],"versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/nomad"}],"references":["https://discuss.hashicorp.com/t/hcsec-2026-14-nomad-arbitrary-file-read-write-on-client-host-through-symlink-attack/77416"],"weaknesses":["CWE-59"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/6xxx/CVE-2026-6959.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6959","state":"PUBLISHED","datePublished":"2026-05-12T18:59:09.029Z","dateUpdated":"2026-05-12T20:16:15.200Z","assignerShortName":"HashiCorp","assignerOrgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","dateReserved":"2026-04-24T14:29:55.377Z"},"containers":{"cna":{"title":"Nomad vulnerable to arbitrary file read/write on client host through symlink attack","descriptions":[{"lang":"en","value":"HashiCorp Nomad and Nomad Enterprise prior to 2.0.1 are vulnerable to arbitrary file read and write on the client host as the Nomad process user through a symlink attack. This vulnerability (CVE-2026-6959) is fixed in Nomad 2.0.1, 1.11.5 and 1.10.11."}],"affected":[{"vendor":"HashiCorp","product":"Nomad","defaultStatus":"unaffected","versions":[{"version":"0.9.0","status":"affected","lessThan":"2.0.1","versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/nomad"},{"vendor":"HashiCorp","product":"Nomad Enterprise","defaultStatus":"unaffected","versions":[{"version":"0.9.0","status":"affected","lessThan":"2.0.1","changes":[{"at":"1.11.5","status":"unaffected"},{"at":"1.10.11","status":"unaffected"}],"versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/nomad"}],"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-14-nomad-arbitrary-file-read-write-on-client-host-through-symlink-attack/77416"}],"metrics":[{"cvssV3_1":{"baseScore":6,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access (Link Following)","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"HashiCorp","orgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","dateUpdated":"2026-05-12T18:59:09.029Z"},"credits":[{"lang":"en","value":"This issue was identified by Alex Manson (Aiven / NeuroWinter)."}],"impacts":[{"capecId":"CAPEC-132","descriptions":[{"lang":"en","value":"CAPEC-132: Symlink Attack"}]}],"source":{"advisory":"HCSEC-2026-14","discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-12T20:14:14.584948Z","id":"CVE-2026-6959","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":"2026-05-12T20:16:15.200Z"}}]}}}