{"cve":"CVE-2026-49252","nvd":{"published":"2026-06-18T21:16:29.643","modified":"2026-10-26T11:10:00.157","status":"Deferred","description":"deepstream is a server that allows clients and backend services to sync data, send messages and make rpcs at scale. Versions prior to 10.0.5  are vulnerable to Prototype Pollution. Exploitation can lead to potential privilege escalation from any authenticated user with write permission to any record. This issue has been fixed in version 10.0.5.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","score":9.9},"cwes":["CWE-1321"],"references":["https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44","https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6"],"products":[],"source":"nvd","synced_at":"2026-10-26T11:33:08.859761529+00:00"},"epss":{"cve":"CVE-2026-49252","score":0.0047,"percentile":0.40377,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-9v98-6g37-x9g6","url":"https://osv.dev/vulnerability/GHSA-9v98-6g37-x9g6","summary":"deepstream is vulnerable to prototype pollution","modified":"2026-09-10T03:50:55.381071193Z","packages":[{"ecosystem":"npm","name":"@deepstream/server","purl":"pkg:npm/%40deepstream/server","ranges":["<10.0.5"],"fixed":["10.0.5"]}]}],"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."]}