{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/socket.io-parser-2.x/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-69185"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["socket.io-parser (4.x)","socket.io-parser (3.x)","socket.io-parser (2.x)"],"_cs_severities":["low"],"_cs_tags":["denial-of-service","vulnerability","javascript","npm","supply-chain"],"_cs_type":"advisory","_cs_vendors":["Socket.IO"],"content_html":"\u003cp\u003eSocket.IO, a widely used library for real-time bidirectional communication, contains a memory exhaustion vulnerability within its parser component, identified as CVE-2026-69185. The vulnerability resides in how the \u003ccode\u003esocket.io-parser\u003c/code\u003e handles binary attachments. An attacker can transmit a specially crafted, malicious packet that claims to contain a large number of attachments or forces the parser to allocate memory for those attachments in a way that exceeds server capacity.\u003c/p\u003e\n\u003cp\u003eBecause the server attempts to buffer these attachments upon receiving the packet, it can lead to rapid memory consumption, effectively resulting in a denial-of-service (DoS) condition. This issue affects various versions of the \u003ccode\u003esocket.io-parser\u003c/code\u003e dependency used across the 4.x, 2.x, and legacy client versions of Socket.IO. Since the parser is a fundamental component of the library's messaging architecture, any application exposing a WebSocket interface that parses these packets is inherently vulnerable. There are no configuration-based workarounds; organizations must update the library to the specific patched versions provided by the vendor.\u003c/p\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThe impact of this vulnerability is a high-severity denial-of-service. If exploited, an attacker can crash individual server instances or exhaust system resources, leading to service disruption for real-time applications. Given the ubiquitous nature of Socket.IO in web and mobile backends, this affects any sector utilizing real-time communication, including messaging platforms, collaborative tools, and financial market data feeds.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIdentify all applications in the environment using \u003ccode\u003esocket.io\u003c/code\u003e or \u003ccode\u003esocket.io-client\u003c/code\u003e by scanning \u003ccode\u003epackage-lock.json\u003c/code\u003e or \u003ccode\u003eyarn.lock\u003c/code\u003e files for the vulnerable \u003ccode\u003esocket.io-parser\u003c/code\u003e versions identified in the Affected Products list.\u003c/li\u003e\n\u003cli\u003eUpdate all instances of \u003ccode\u003esocket.io-parser\u003c/code\u003e to version 4.2.7 or 3.4.5, or the relevant fixed version for older client libraries.\u003c/li\u003e\n\u003cli\u003eMonitor server memory utilization metrics (e.g., resident set size, heap usage) in orchestration platforms like Kubernetes or cloud-based server environments to detect sudden, unexplained memory spikes consistent with DoS attempts.\u003c/li\u003e\n\u003cli\u003eImplement request size limits and connection timeouts at the Load Balancer or Reverse Proxy layer to mitigate the impact of abnormally large or resource-intensive incoming packets.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-08-03T20:48:28Z","date_published":"2026-08-03T20:48:28Z","id":"https://feed.craftedsignal.io/briefs/2026-08-socketio-memory-exhaustion/","summary":"A memory exhaustion vulnerability in socket.io-parser (CVE-2026-69185) allows remote attackers to trigger denial-of-service by sending specially crafted packets containing a large number of binary attachments.","title":"Memory Exhaustion in Socket.IO Parser","url":"https://feed.craftedsignal.io/briefs/2026-08-socketio-memory-exhaustion/"}],"language":"en","title":"CraftedSignal Threat Feed - Socket.io-Parser (2.x)","version":"https://jsonfeed.org/version/1.1"}