{“lastseen”:””,”description”:”Loop with Unreachable Exit Condition (‘Infinite Loop’) vulnerability in mtrudel bandit allows unauthenticated remote denial of service via worker process exhaustion.\\n\\n’Elixir.Bandit.HTTP1.Socket’:do_read_chunked_data!\/5 in lib\/bandit\/http1\/socket.ex terminates only when the last-chunk line 0\\\\r\\\\n is followed immediately by the empty trailer line \\\\r\\\\n. RFC 9112 \u00a77.1.2 permits zero or more trailer fields between them. When trailers are present, none of the match clauses fit: the catch-all arm computes a negative to_read, calls read_available!\/2, receives \\u003c\\u003c\\u003e\\u003e on timeout, and tail-recurses with unchanged state. The worker process is pinned for the lifetime of the TCP connection.\\n\\nA handful of concurrent connections sending RFC-conformant chunked requests with trailer fields is sufficient to exhaust the Bandit worker pool and render the server unresponsive to all further traffic. No authentication, special headers, or large payload is required. Proxies such as NGINX and HAProxy legitimately forward trailer-bearing requests, so servers behind such proxies may be affected without any malicious client involvement.\\n\\nThis issue affects bandit: from 1.6.1 before 1.11.1.”,”published”:”2026-05-13T13:36:17.806Z”,”modified”:”2026-05-13T14:36:34.475Z”,”type”:”cve”,”title”:”HTTP\/1 chunked decoder infinite loop on requests with trailer fields in bandit”,”source”:”EEF”,”references”:”https:\/\/github.com\/mtrudel\/bandit\/security\/advisories\/GHSA-rf5q-vwxw-gmrf\\nhttps:\/\/cna.erlef.org\/cves\/CVE-2026-39806.html\\nhttps:\/\/osv.dev\/vulnerability\/EEF-CVE-2026-39806\\nhttps:\/\/github.com\/mtrudel\/bandit\/commit\/ae3520dfdbfab115c638f8c7f6f6b805db34e1ab”,”id”:”CVE-2026-39806″,”bulletinFamily”:””,”cwe”:[“CWE-835″],”cvelist”:null,”sourceData”:”mtrudel bandit 1.6.1\\nmtrudel bandit e73e379ab59840e8561b5730878f16e29ab06217″,”sourceHref”:””,”cvss”:{“score”:8.7,”severity”:”HIGH”,”vector”:”CVSS:4.0\/AV:N\/AC:L\/AT:N\/PR:N\/UI:N\/VC:N\/VI:N\/VA:H\/SC:N\/SI:N\/SA:N”,”version”:”4.0″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”bandit”,”version”:”1.6.1″,”vendor”:”mtrudel”,”ai_description”:”Infinite Loop vulnerability in bandit allowing unauthenticated remote denial of service via worker process exhaustion”,”ai_severity”:”High”,”ai_vendor”:”mtrudel”,”ai_product”:”bandit”,”ai_version”:”1.6.1 to 1.11.0″,”ai_score”:8.7}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”description”:”Loop with Unreachable Exit Condition (‘Infinite Loop’) vulnerability in mtrudel bandit allows unauthenticated remote denial of service via worker process exhaustion.\\n\\n’Elixir.Bandit.HTTP1.Socket’:do_read_chunked_data!\/5 in lib\/bandit\/http1\/socket.ex terminates only…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,19,12,15,13,7,11,5],"class_list":["post-54122","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-87","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n