{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/facil.io-0.7.0/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.3,"id":"CVE-2026-16632"}],"_cs_exploited":true,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["facil.io 0.7.4","facil.io 0.7.3","facil.io 0.7.2","facil.io 0.7.1","facil.io 0.7.0"],"_cs_severities":["high"],"_cs_tags":["vulnerability","web-application","input-validation","remote-code-execution"],"_cs_type":"threat","_cs_vendors":["boazsegev"],"content_html":"\u003cp\u003eA high-severity vulnerability, CVE-2026-16632, has been identified in the \u003ccode\u003eboazsegev facil.io\u003c/code\u003e library, specifically in versions up to 0.7.4. The flaw resides within the \u003ccode\u003ewebsocket_on_protocol_error\u003c/code\u003e function located in \u003ccode\u003elib/facil/http/parsers/websocket_parser.h\u003c/code\u003e, which is part of the WebSocket Frame Parser component. This vulnerability is due to improper input validation (CWE-20) when manipulating the \u003ccode\u003eon_message\u003c/code\u003e argument, allowing a remote attacker to exploit the system without authentication. A public exploit has been released, significantly increasing the risk of active exploitation. The project maintainers were notified of the issue through an early report but have not yet responded or released a patch. Organizations using affected versions of \u003ccode\u003efacil.io\u003c/code\u003e are at risk of remote attacks impacting service availability or data confidentiality.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eA remote unauthenticated attacker crafts a malicious WebSocket frame designed to trigger an error condition within the \u003ccode\u003efacil.io\u003c/code\u003e library.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003efacil.io\u003c/code\u003e server, utilizing its \u003ccode\u003eWebSocket Frame Parser\u003c/code\u003e, receives and attempts to process this malformed frame.\u003c/li\u003e\n\u003cli\u003eThe malformed frame causes the \u003ccode\u003ewebsocket_on_protocol_error\u003c/code\u003e function to be invoked within the WebSocket Frame Parser.\u003c/li\u003e\n\u003cli\u003eDuring the execution of \u003ccode\u003ewebsocket_on_protocol_error\u003c/code\u003e, the \u003ccode\u003eon_message\u003c/code\u003e argument is improperly handled due to the underlying vulnerability.\u003c/li\u003e\n\u003cli\u003eThis improper input validation (CWE-20) allows the attacker's specially crafted data to corrupt internal state or memory.\u003c/li\u003e\n\u003cli\u003eSuccessful exploitation can lead to a denial of service (DoS) by crashing the application, or potentially information disclosure, allowing the attacker to impact system availability or data confidentiality.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThe successful exploitation of CVE-2026-16632 can lead to a denial of service (DoS) for applications utilizing \u003ccode\u003eboazsegev facil.io\u003c/code\u003e versions up to 0.7.4, rendering them unavailable to legitimate users. Depending on the specifics of the memory corruption or internal state manipulation, there is also a potential risk of information disclosure, where sensitive data could be exposed. The availability of a public exploit significantly elevates the threat level, making it easier for a wider range of attackers to target affected systems. As the project maintainers have not yet responded to the reported flaw, organizations remain vulnerable until a patch is released or workarounds are implemented.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePrioritize patching \u003ccode\u003eboazsegev facil.io\u003c/code\u003e once an official update addressing CVE-2026-16632 is released by the vendor.\u003c/li\u003e\n\u003cli\u003eReview network logs and application error logs for unusual WebSocket traffic patterns or application crashes potentially indicative of attempts to exploit CVE-2026-16632.\u003c/li\u003e\n\u003cli\u003eMonitor affected systems for unexpected restarts or abnormal resource consumption that could signal a denial of service attack.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-23T00:17:53Z","date_published":"2026-07-23T00:17:53Z","id":"https://feed.craftedsignal.io/briefs/2026-07-facil-io-cve-2026-16632/","summary":"A high-severity improper input validation vulnerability, CVE-2026-16632, exists in the `websocket_on_protocol_error` function of the `boazsegev facil.io` WebSocket Frame Parser, allowing a remote unauthenticated attacker to manipulate the `on_message` argument with a publicly available exploit, potentially leading to denial of service or information disclosure.","title":"Improper Input Validation in boazsegev facil.io WebSocket Frame Parser (CVE-2026-16632)","url":"https://feed.craftedsignal.io/briefs/2026-07-facil-io-cve-2026-16632/"}],"language":"en","title":"CraftedSignal Threat Feed - Facil.io 0.7.0","version":"https://jsonfeed.org/version/1.1"}