{"id":"GHSA-9v98-6g37-x9g6","summary":"deepstream is vulnerable to prototype pollution","details":"### Impact\nPrototype pollution in deepstream server v \u003c=10.0.4. Potential privilege escalation from any authenticated user with write permission to any record.\n\n### Patches\nYes, upgrade to v10.0.5\n\n### Workarounds\nFilter out all messages containing the path `__proto__`, `constructor`, `prototype`, **before they reach the server's message pipeline**","aliases":["CVE-2026-49252"],"modified":"2026-09-10T03:50:55.381071193Z","published":"2026-06-26T21:03:59Z","database_specific":{"github_reviewed_at":"2026-06-26T21:03:59Z","nvd_published_at":"2026-06-18T21:16:29Z","cwe_ids":["CWE-1321"],"severity":"CRITICAL","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49252"},{"type":"WEB","url":"https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44"},{"type":"PACKAGE","url":"https://github.com/deepstreamIO/deepstream.io"}],"affected":[{"package":{"name":"@deepstream/server","ecosystem":"npm","purl":"pkg:npm/%40deepstream/server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"10.0.5"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9v98-6g37-x9g6/GHSA-9v98-6g37-x9g6.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L"}]}