{"id":"CVE-2026-54746","state":"PUBLISHED","title":"Hatchet: Cross-tenant write/DoS to other tenants' workers via Dispatcher gRPC UpsertWorkerLabels and Unsubscribe","description":"Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. From 0.40.0 until 0.91.1, the Dispatcher gRPC service does not verify that a request's worker ID belongs to the tenant identified by the bearer-token context in Dispatcher/UpsertWorkerLabels and Dispatcher/Unsubscribe. An authenticated owner of any tenant who guesses another tenant's worker UUID can overwrite that worker's affinity labels or disconnect the worker from the dispatcher. This can cause cross-tenant integrity impact and denial of service on multi-tenant Hatchet Cloud or shared self-hosted deployments. Single-tenant deployments are not practically affected because the attacker and target tenant are the same. This issue is fixed in version 0.91.1.","publishedAt":"2026-08-28T16:08:37.816Z","updatedAt":"2026-08-28T20:20:37.452Z","severity":{"score":6.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["hatchet-dev hatchet"],"affected":[{"vendor":"hatchet-dev","product":"hatchet","versions":[{"version":">= 0.40.0, < 0.91.1","status":"affected"}]}],"references":["https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-8x7x-83cf-c3pg","https://github.com/hatchet-dev/hatchet/commit/591a30deb8b80f02eba7014997de387d710986c9","https://github.com/hatchet-dev/hatchet/releases/tag/v0.91.1"],"weaknesses":["CWE-639","CWE-862"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54746.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54746","state":"PUBLISHED","datePublished":"2026-08-28T16:08:37.816Z","dateUpdated":"2026-08-28T20:20:37.452Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T23:12:41.964Z"},"containers":{"cna":{"title":"Hatchet: Cross-tenant write/DoS to other tenants' workers via Dispatcher gRPC UpsertWorkerLabels and Unsubscribe","descriptions":[{"lang":"en","value":"Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. From 0.40.0 until 0.91.1, the Dispatcher gRPC service does not verify that a request's worker ID belongs to the tenant identified by the bearer-token context in Dispatcher/UpsertWorkerLabels and Dispatcher/Unsubscribe. An authenticated owner of any tenant who guesses another tenant's worker UUID can overwrite that worker's affinity labels or disconnect the worker from the dispatcher. This can cause cross-tenant integrity impact and denial of service on multi-tenant Hatchet Cloud or shared self-hosted deployments. Single-tenant deployments are not practically affected because the attacker and target tenant are the same. This issue is fixed in version 0.91.1."}],"affected":[{"vendor":"hatchet-dev","product":"hatchet","versions":[{"version":">= 0.40.0, < 0.91.1","status":"affected"}]}],"references":[{"url":"https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-8x7x-83cf-c3pg","name":"https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-8x7x-83cf-c3pg","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/hatchet-dev/hatchet/commit/591a30deb8b80f02eba7014997de387d710986c9","name":"https://github.com/hatchet-dev/hatchet/commit/591a30deb8b80f02eba7014997de387d710986c9","tags":["x_refsource_MISC"]},{"url":"https://github.com/hatchet-dev/hatchet/releases/tag/v0.91.1","name":"https://github.com/hatchet-dev/hatchet/releases/tag/v0.91.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-28T16:08:37.816Z"},"source":{"advisory":"GHSA-8x7x-83cf-c3pg","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T20:20:26.098726Z","id":"CVE-2026-54746","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":"2026-08-28T20:20:37.452Z"}}]}}}