{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","favicon":"https://feed.craftedsignal.io/favicon-32x32.png","feed_url":"https://feed.craftedsignal.io/products/civetweb--1.16/feed.json","home_page_url":"https://feed.craftedsignal.io/","icon":"https://feed.craftedsignal.io/apple-touch-icon.png","items":[{"_cs_actors":[],"_cs_cpes":["cpe:2.3:a:civetweb:civetweb:*:*:*:*:*:*:*:*"],"_cs_cves":[{"cvss":8.1,"id":"CVE-2026-124040"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["CivetWeb (\u003c= 1.16)"],"_cs_severities":["high"],"_cs_tags":[],"_cs_type":"advisory","_cs_vendors":["CivetWeb"],"content_html":"\u003cp\u003eCivetWeb through 1.16 is vulnerable to a use-after-free in the handle_http2() function when the server is compiled with USE_HTTP2 and the enable_http2 configuration is set to on. The vulnerability occurs because the server retains pointers to freed :method and :path pseudo-headers. An unauthenticated attacker can exploit this by sending a crafted HEADERS frame that omits these pseudo-headers, potentially leading to server crashes or the manipulation of request methods and paths to bypass configured access rules.\u003c/p\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eRemote unauthenticated attackers may cause a service crash (denial of service) or influence the internal request processing state to bypass access control restrictions.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInventory systems running CivetWeb to determine if the USE_HTTP2 build flag is active and enable_http2 is configured.\u003c/li\u003e\n\u003cli\u003eDisable HTTP/2 support in the CivetWeb configuration if it is not required for production services.\u003c/li\u003e\n\u003cli\u003eMonitor vendor security bulletins for the release of a patched version of CivetWeb and prioritize deployment.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-11-06T21:29:08Z","date_published":"2026-11-06T21:29:08Z","id":"https://feed.craftedsignal.io/briefs/2026-11-civetweb-uaf/","summary":"CivetWeb versions through 1.16 contain a use-after-free vulnerability in the handle_http2 function that may allow unauthenticated remote attackers to bypass access control or cause a denial of service.","title":"CivetWeb: Use-after-free in handle_http2 (CVE-2026-124040)","url":"https://feed.craftedsignal.io/briefs/2026-11-civetweb-uaf/"}],"language":"en","title":"CraftedSignal Threat Feed - CivetWeb (\u003c= 1.16)","version":"https://jsonfeed.org/version/1.1"}