{"id":"CVE-2026-107347","state":"PUBLISHED","title":"Nomad dispatch payload writes can escape the allocation directory through symlinks","description":"HashiCorp Nomad and Nomad Enterprise are vulnerable to symlink following during dispatch payload and executor log writes that may allow a malicious workload to modify files outside its allocation directory. When the client agent runs as root, this could lead to code execution as root on the client host. This vulnerability (CVE-2026-107347) is fixed in Nomad 2.1.1 and Nomad Enterprise 2.1.0, 1.11.12, and 1.10.18.","publishedAt":"2026-10-29T18:10:08.951Z","updatedAt":"2026-10-30T17:19:16.677Z","severity":{"score":8.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","source":"HashiCorp"},"assigner":"HashiCorp","products":["HashiCorp Nomad","HashiCorp Nomad Enterprise"],"affected":[{"vendor":"HashiCorp","product":"Nomad","defaultStatus":"unaffected","versions":[{"version":"0.3.0","status":"affected","lessThan":"2.1.1","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":"0.3.0","status":"affected","lessThan":"2.1.0","changes":[{"at":"1.11.12","status":"unaffected"},{"at":"1.10.18","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-2026-52-nomad-dispatch-payload-writes-can-escape-the-allocation-directory-through-symlinks/77930"],"weaknesses":["CWE-59"],"ingestedAt":"2026-10-30T17:28:06.624Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/107xxx/CVE-2026-107347.json","commit":"3341b8c15da9d44519feb86e18f02f360209d08a","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-107347","state":"PUBLISHED","datePublished":"2026-10-29T18:10:08.951Z","dateUpdated":"2026-10-30T17:19:16.677Z","assignerShortName":"HashiCorp","assignerOrgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","dateReserved":"2026-10-07T19:05:30.509Z"},"containers":{"cna":{"title":"Nomad dispatch payload writes can escape the allocation directory through symlinks","descriptions":[{"lang":"en","value":"HashiCorp Nomad and Nomad Enterprise are vulnerable to symlink following during dispatch payload and executor log writes that may allow a malicious workload to modify files outside its allocation directory. When the client agent runs as root, this could lead to code execution as root on the client host. This vulnerability (CVE-2026-107347) is fixed in Nomad 2.1.1 and Nomad Enterprise 2.1.0, 1.11.12, and 1.10.18."}],"affected":[{"vendor":"HashiCorp","product":"Nomad","defaultStatus":"unaffected","versions":[{"version":"0.3.0","status":"affected","lessThan":"2.1.1","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":"0.3.0","status":"affected","lessThan":"2.1.0","changes":[{"at":"1.11.12","status":"unaffected"},{"at":"1.10.18","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-2026-52-nomad-dispatch-payload-writes-can-escape-the-allocation-directory-through-symlinks/77930"}],"metrics":[{"cvssV3_1":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","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":"2026-10-30T14:10:12.255Z"},"credits":[{"lang":"en","value":"This issue was reported to HashiCorp by Yonghwa Lee (Theori) and Habib (Syndicat3 Security Research Team)."}],"impacts":[{"capecId":"CAPEC-132","descriptions":[{"lang":"en","value":"CAPEC-132: Symlink Attack"}]}],"source":{"advisory":"HCSEC-2026-52","discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T17:19:03.266866Z","id":"CVE-2026-107347","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":"2026-10-30T17:19:16.677Z"}}]}}}