{"id":"CVE-2026-54324","aliases":["GHSA-qwxf-2m7m-2m3x","GO-2026-5598"],"url":"https://o3.security/vulnerability/CVE-2026-54324","summary":"Daytona: Cross-tenant data leak in notification WebSocket gateway via unverified organizationId join","details":"### Summary\nA cross-tenant authorization flaw in Daytona's notification WebSocket gateway allowed any authenticated user to subscribe to another organization's realtime notification channel and passively receive that organization's events.\n\n### Impact\nThe notification gateway's JWT handshake joined a client-supplied organization identifier to the corresponding notification room without verifying that the authenticated user was a member of that organization. As a result, an authenticated user could receive another organization's realtime sandbox, snapshot, volume, and runner events, including data carried in those events. This is a cross-tenant confidentiality break. It required a valid account and knowledge of the target organization id (a non-secret UUID); no elevated privileges were needed. The API-key authentication path was not affected.\n\nThe affected component is the Daytona API service (the `apps/api` NestJS application). It is distributed through Daytona's repository releases and container images for self-hosted deployments; it is not published as a Go or npm package, so the advisory will not surface through `go get` or npm dependency tooling.\n\n### Affected Versions\n>= 0.101.0, <= 0.184.0\n\n### Patched Versions\n0.185.0\n\n### Credit\n@vnth4nhnt from CyStack","published":"2026-06-23T18:07:23.745Z","modified":"2026-10-21T02:58:33.301251739Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.00456,"percentile":0.38435,"asOf":"2026-09-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/daytonaio/daytona","fixedVersion":"0.185.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54324.json"},{"type":"ADVISORY","url":"https://github.com/daytonaio/daytona/security/advisories/GHSA-qwxf-2m7m-2m3x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54324"},{"type":"PACKAGE","url":"https://github.com/daytonaio/daytona"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:58:33.301251739Z"}}