{"cve":"CVE-2026-84298","nvd":{"published":"2026-09-21T16:17:24.803","modified":"2026-09-23T18:26:49.087","status":"Deferred","description":"Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.95.3, the V1 DurableTask stream handler stores worker-supplied task_external_id values in the durableInvocations routing map before tenant ownership is verified, and callback delivery resolves that map by task UUID without tenant identity. An authenticated tenant worker that knows another tenant's durable task UUID and keeps a stream open on the same dispatcher process can receive that task's durable callback result payload. UUIDv4 values are not enumerable, and single-tenant deployments are unaffected in practice. This issue is fixed in version 0.95.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","score":3.1},"cwes":["CWE-639","CWE-862"],"references":["https://github.com/hatchet-dev/hatchet/commit/9555bfdd1e97f61d25e614ccaa107c5fb7dc4976","https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-9q4h-f4x5-ffq8"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-84298","score":0.00243,"percentile":0.15557,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9q4h-f4x5-ffq8","url":"https://osv.dev/vulnerability/GHSA-9q4h-f4x5-ffq8","summary":"Hatchet: Cross-tenant durable callback payload disclosure in Hatchet V1 Dispatcher","modified":"2026-10-01T20:56:05.514832277Z","packages":[{"ecosystem":"Go","name":"github.com/hatchet-dev/hatchet","purl":"pkg:golang/github.com/hatchet-dev/hatchet","ranges":["<0.95.3"],"fixed":["0.95.3"]}]},{"id":"GO-2026-6561","url":"https://osv.dev/vulnerability/GO-2026-6561","summary":"Hatchet: Cross-tenant durable callback payload disclosure in Hatchet V1 Dispatcher in github.com/hatchet-dev/hatchet","modified":"2026-10-01T20:45:13.187257332Z","packages":[{"ecosystem":"Go","name":"github.com/hatchet-dev/hatchet","purl":"pkg:golang/github.com/hatchet-dev/hatchet","ranges":["<0.95.3"],"fixed":["0.95.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}