{"items":[{"id":"NVI-00016106","kind":"vulnerability","title":"Socket.IO: Engine.IO Polling Transport Connection Exhaustion","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-r635-g3xr-vw7x","CVE-2026-59725"],"plain_summary":"GitHub lists this reviewed advisory for engine.io. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-1e981b8459bc2e80bde63f84507307c9"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-20T21:49:55.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-24236cf66354a327046bea9abbcc9707"},{"kind":"CVSS","as_of":"2026-10-25T20:10:00.147Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-1e981b8459bc2e80bde63f84507307c9"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-24236cf66354a327046bea9abbcc9707","url":"https://github.com/advisories/GHSA-r635-g3xr-vw7x","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-r635-g3xr-vw7x","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:35:18.117Z"},{"id":"sr-1e981b8459bc2e80bde63f84507307c9","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59725","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-59725","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T08:05:01.676Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-24236cf66354a327046bea9abbcc9707"],"technology":"engine.io","known_exclusions":[],"conditions_summary":"### Impact\n\nAn unauthenticated remote attacker can cause a denial of service in affected versions of **engine.io** by opening Engine.IO polling sessions and sending an invalid binary `POST` request with:\n\n```\nContent-Type: application/octet-stream\n```\n\n\nagainst an Engine.IO protocol v4 polling transport.\n\nIn the vulnerable code path, the server reports a transport error but does not properly close the HTTP response associated with the malformed request. As a result, the underlying HTTP connection may remain open, consuming one server-side socket/resource per crafted request.\n\nAn attacker can repeat this with many sessions to exhaust available HTTP connections, sockets, file descriptors, or related server resources, potentially preventing legitimate clients from connecting.\n\n### Patches\n\nThe issue was fixed in:\n\n- **engine.io `6.6.7`**\n\nThe fix ensures that invalid binary polling `POST` requests are explicitly rejected with an HTTP response and closed properly.\n\nUsers should upgrade to:\n\n```sh\nnpm install engine.io@^6.6.7\n```\n\nor a later fixed version.\n\nIf using Socket.IO through the monorepo/packages, update to a Socket.IO release that depends on a fixed `engine.io` version.\n\n### W","public_affected_ranges":[">= 4.1.0, < 6.6.7"]}],"null_published_at":"2026-11-08T19:53:44.036Z","source_updated_at":"2026-07-20T21:49:55.000Z","source_disclosed_at":"2026-07-20T21:49:54.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-03T22:35:18.117Z"},{"id":"NVI-00016106","kind":"vulnerability","title":"Socket.IO: Engine.IO Polling Transport Connection Exhaustion","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-r635-g3xr-vw7x","CVE-2026-59725"],"plain_summary":"GitHub lists this reviewed advisory for engine.io. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-24236cf66354a327046bea9abbcc9707"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-20T21:49:55.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-24236cf66354a327046bea9abbcc9707"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-24236cf66354a327046bea9abbcc9707","url":"https://github.com/advisories/GHSA-r635-g3xr-vw7x","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-r635-g3xr-vw7x","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:35:18.117Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-24236cf66354a327046bea9abbcc9707"],"technology":"engine.io","known_exclusions":[],"conditions_summary":"### Impact\n\nAn unauthenticated remote attacker can cause a denial of service in affected versions of **engine.io** by opening Engine.IO polling sessions and sending an invalid binary `POST` request with:\n\n```\nContent-Type: application/octet-stream\n```\n\n\nagainst an Engine.IO protocol v4 polling transport.\n\nIn the vulnerable code path, the server reports a transport error but does not properly close the HTTP response associated with the malformed request. As a result, the underlying HTTP connection may remain open, consuming one server-side socket/resource per crafted request.\n\nAn attacker can repeat this with many sessions to exhaust available HTTP connections, sockets, file descriptors, or related server resources, potentially preventing legitimate clients from connecting.\n\n### Patches\n\nThe issue was fixed in:\n\n- **engine.io `6.6.7`**\n\nThe fix ensures that invalid binary polling `POST` requests are explicitly rejected with an HTTP response and closed properly.\n\nUsers should upgrade to:\n\n```sh\nnpm install engine.io@^6.6.7\n```\n\nor a later fixed version.\n\nIf using Socket.IO through the monorepo/packages, update to a Socket.IO release that depends on a fixed `engine.io` version.\n\n### W","public_affected_ranges":[">= 4.1.0, < 6.6.7"]}],"null_published_at":"2026-11-04T10:04:27.892Z","source_updated_at":"2026-07-20T21:49:55.000Z","source_disclosed_at":"2026-07-20T21:49:54.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T22:35:18.117Z"}],"next_cursor":null,"snapshot_revision":"42594"}