{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/message-corruption/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["websocket-driver (\u003c 0.7.5)"],"_cs_severities":["medium"],"_cs_tags":["vulnerability","websocket","npm","message-corruption"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA critical vulnerability, tracked as CVE-2026-54466, has been identified in the \u003ccode\u003ewebsocket-driver\u003c/code\u003e npm package, affecting versions prior to 0.7.5. This flaw stems from an issue in how the library parses the length header in draft versions of the WebSocket protocol. An attacker can craft a malicious WebSocket frame containing an indefinitely long sequence of bytes (0x80 or above) in the length header field. This forces the server-side \u003ccode\u003ewebsocket-driver\u003c/code\u003e to attempt parsing an ever-growing integer for the message length. As JavaScript numbers are 64-bit floating-point values, this process eventually leads to a loss of precision, causing the subsequent WebSocket payload to be parsed incorrectly. This message corruption can disrupt application functionality, lead to data integrity issues, or potentially facilitate further attacks by misinterpreting critical message content. All users are advised to upgrade to version 0.7.5 or later to mitigate this risk.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker crafts a WebSocket frame designed to exploit the length header parsing vulnerability.\u003c/li\u003e\n\u003cli\u003eThe attacker sends this malicious WebSocket frame to a server running an application that uses the vulnerable \u003ccode\u003ewebsocket-driver\u003c/code\u003e library (version \u0026lt; 0.7.5).\u003c/li\u003e\n\u003cli\u003eThe crafted frame includes an indefinite sequence of bytes (values 0x80 or above) in the WebSocket protocol's length header field.\u003c/li\u003e\n\u003cli\u003eThe server-side \u003ccode\u003ewebsocket-driver\u003c/code\u003e attempts to parse this extended length header into an integer.\u003c/li\u003e\n\u003cli\u003eDue to the arbitrary size of the crafted length header and the limitations of JavaScript's 64-bit floating-point number representation, the integer value loses precision.\u003c/li\u003e\n\u003cli\u003eThis precision loss results in the \u003ccode\u003ewebsocket-driver\u003c/code\u003e incorrectly calculating the actual length of the subsequent payload data.\u003c/li\u003e\n\u003cli\u003eThe application processes the payload based on this corrupted length, leading to message corruption and misinterpretation of data.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThe successful exploitation of CVE-2026-54466 can lead to severe message corruption within applications utilizing the vulnerable \u003ccode\u003ewebsocket-driver\u003c/code\u003e library. This corruption can manifest as data integrity issues, application instability, denial of service, or unpredictable behavior. Depending on the criticality of the data exchanged over WebSocket, attackers could potentially manipulate application state or bypass security controls by causing a misinterpretation of commands or sensitive information. While specific victim counts or targeted sectors are not detailed, any application relying on an unpatched \u003ccode\u003ewebsocket-driver\u003c/code\u003e version is susceptible. There are no known workarounds for this issue, making patching essential.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePatch CVE-2026-54466 by upgrading the \u003ccode\u003ewebsocket-driver\u003c/code\u003e npm package to version 0.7.5 or later immediately.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-15T22:08:43Z","date_published":"2026-07-15T22:08:43Z","id":"https://feed.craftedsignal.io/briefs/2026-07-websocket-driver-message-corruption/","summary":"A critical vulnerability, CVE-2026-54466, in the `websocket-driver` npm library allows remote attackers to cause message corruption by sending specially crafted WebSocket frames that exploit improper handling of the protocol's length header, leading to incorrect parsing of subsequent payload data.","title":"Message Corruption Vulnerability in websocket-driver Library (CVE-2026-54466)","url":"https://feed.craftedsignal.io/briefs/2026-07-websocket-driver-message-corruption/"}],"language":"en","title":"CraftedSignal Threat Feed - Message-Corruption","version":"https://jsonfeed.org/version/1.1"}