{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-49252: deepstream is vulnerable to prototype pollution","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-49252","status":"final","version":"1","initial_release_date":"2026-06-18T20:01:31.307Z","current_release_date":"2026-06-18T20:01:31.307Z","revision_history":[{"date":"2026-06-18T20:01:31.307Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-49252 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-49252"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-49252"},{"category":"external","summary":"https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6","url":"https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6"},{"category":"external","summary":"https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44","url":"https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44"}]},"product_tree":{"branches":[{"category":"vendor","name":"deepstreamIO","branches":[{"category":"product_name","name":"deepstream.io","branches":[{"category":"product_version","name":"< 10.0.5","product":{"name":"deepstreamIO deepstream.io < 10.0.5","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:deepstreamio:deepstream.io:\\<_10.0.5:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-49252","title":"deepstream is vulnerable to prototype pollution","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","baseScore":9.9,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}