{"id":"CVE-2026-88978","kind":"vulnerability","aliases":["CVE-2026-88978","GHSA-992g-9cr3-vm5x","GO-2026-6560"],"related":[],"title":"Hatchet DurableTask WorkerStatus gRPC resolves caller-supplied durable-task UUIDs via ListSatisfiedEntries with no tenant_id filter in github.com/hatchet-dev/hatchet","description":"Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.106.1, the WorkerStatus gRPC polling path in pkg/repository/durable_events.go passes caller-supplied durable task, node, and branch identifiers to ListSatisfiedEntries without a tenant filter, allowing an authenticated tenant worker that knows another tenant's durable-task UUID to retrieve matching durable event-log records. The UUIDv4 requirement makes exploitation unlikely, and single-tenant deployments are unaffected in practice. This issue is fixed in version 0.106.1.","summary":"Hatchet's WorkerStatus gRPC polling path looks up durable event-log records by caller-supplied durable task, node, and branch IDs without filtering by tenant. An authenticated tenant worker that knows another tenant's durable-task UUID can read that tenant's matching event-log records.","severity":"medium","cvss":4.3,"epss":0.00281,"exploited":false,"exploited_at":null,"products":[{"name":"github.com/hatchet-dev/hatchet","fixed":["0.106.1"],"affected":"< 0.106.1","ecosystem":"go"}],"ecosystems":["go"],"tags":["go","hatchet","multi-tenant","package","self-hosted"],"not_affected_if":["single-tenant","version-0.106.1-or-later"],"how_to_check":"Check the Hatchet version in go.mod or the deployed image; versions before 0.106.1 are affected.\nSingle-tenant deployments are described as unaffected in practice.","fix":"Upgrade github.com/hatchet-dev/hatchet to 0.106.1 or later.","status":"open","published_at":"2026-09-21T16:17:26+00:00","first_seen_at":"2026-10-23T19:13:08+00:00","triaged_at":"2026-10-23T21:49:10+00:00","updated_at":"2026-10-23T21:49:10+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-23T21:49:10Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade github.com/hatchet-dev/hatchet to 0.106.1 or later.","reach":"unknown","impact":"medium","summary":"Hatchet's WorkerStatus gRPC polling path looks up durable event-log records by caller-supplied durable task, node, and branch IDs without filtering by tenant. An authenticated tenant worker that knows another tenant's durable-task UUID can read that tenant's matching event-log records.","category":"package","who_cares":["go","hatchet","multi-tenant","self-hosted"],"confidence":0.7,"needs_auth":"yes","worst_case":"Authenticated tenant worker reads other tenants' durable event-log records.","analyst_note":"","how_to_check":"Check the Hatchet version in go.mod or the deployed image; versions before 0.106.1 are affected.\nSingle-tenant deployments are described as unaffected in practice.","needs_analyst":false,"not_affected_if":["single-tenant","version-0.106.1-or-later"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000942,"input_tokens":3076,"output_tokens":1268,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':25A,33A,36A '-6560':34A '-88978':26A,37A '/hatchet-dev/hatchet':23A,40A '0.106.1':117C,184C '992g':29A '9cr3':30A 'agent':109C 'ai':108C 'allow':141C 'anoth':83B,148C 'authent':78B,143C 'background':106C 'branch':71B,133C 'caller':7A,65B,127C 'caller-suppli':6A,64B,126C 'cve':24A,35A 'deploy':173C 'durabl':10A,58B,67B,87B,111C,129C,152C,158C 'durable-task':9A,86B,151C 'durabletask':2A 'event':60B,97B,160C 'event-log':59B,96B,159C 'exploit':167C 'filter':19A,74B,140C 'fix':181C 'ghsa':28A 'ghsa-992g-9cr3-vm5x':27A 'github.com':22A,39A 'github.com/hatchet-dev/hatchet':21A,38A 'go':32A,41B 'grpc':4A,53B,120C 'hatchet':1A,42B,50B,100C 'host':49B 'id':18A,72B 'identifi':134C 'issu':179C 'know':82B,147C 'listsatisfiedentri':14A,136C 'log':61B,98B,161C 'look':56B 'make':166C 'match':95B,157C 'multi':44B 'multi-ten':43B 'node':69B,131C 'orchestr':105C 'packag':46B 'pass':125C 'path':55B,122C 'pkg/repository/durable_events.go':124C 'platform':103C 'poll':54B,121C 'practic':177C 'prior':115C 'read':91B 'record':62B,99B,162C 'requir':165C 'resolv':5A 'retriev':156C 'scale':114C 'self':48B 'self-host':47B 'singl':171C 'single-ten':170C 'suppli':8A,66B,128C 'task':11A,68B,88B,107C,130C,153C 'tenant':17A,45B,76B,79B,84B,93B,139C,144C,149C,172C 'unaffect':175C 'unlik':168C 'uuid':12A,89B,154C 'uuidv4':164C 'version':183C 'via':13A 'vm5x':31A 'without':73B,137C 'worker':80B,145C 'workerstatus':3A,52B,119C 'workflow':112C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-09-21T16:17:26+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cvss_by":"security-advisories@github.com","poc_count":0,"sources":[{"source":"govuln","external_id":"GO-2026-6560","url":"https://pkg.go.dev/vuln/GO-2026-6560","severity":null,"published_at":"2026-10-01T20:23:38+00:00","modified_at":"2026-10-01T20:23:38+00:00","first_seen_at":"2026-10-23T19:13:08+00:00","fetched_at":"2026-10-23T19:13:08+00:00","note":null},{"source":"epss","external_id":"CVE-2026-88978","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-88978","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:43+00:00","fetched_at":"2026-10-23T19:13:43+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-88978","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88978","severity":null,"published_at":"2026-09-21T16:17:26+00:00","modified_at":"2026-09-24T23:19:21+00:00","first_seen_at":"2026-10-23T19:35:23+00:00","fetched_at":"2026-10-23T19:35:23+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}