{"id":"UBUNTU-CVE-2026-115701","details":"Allocation of Resources Without Limits or Throttling vulnerability in ninenines cowboy allows an unauthenticated remote attacker to exhaust connection process memory over HTTP/1.1. Once a request has been received in full and its handler is still running, cowboy_http:parse/2 in src/cowboy_http.erl appends every further byte that arrives on the keep-alive connection to the connection buffer and returns to the receive loop without parsing it. The socket stays in active mode and no limit applies to this buffer: max_request_line_length, max_headers and the other parser limits only take effect once the handler returns and parsing resumes, and the only timer in this state is idle_timeout (default 60 seconds), which is reset on every received chunk. A client can therefore send an arbitrary amount of data on one connection for as long as the handler runs, and a few connections to an endpoint that holds requests open can drive the Erlang VM into out-of-memory conditions. This issue affects cowboy: from 2.18.0 onward.","modified":"2026-11-10T02:50:21.367604643Z","published":"2026-11-09T00:00:00Z","upstream":["CVE-2026-115701"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-115701"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-115701"},{"type":"REPORT","url":"https://cna.erlef.org/cves/CVE-2026-115701.html"},{"type":"REPORT","url":"https://github.com/ninenines/cowboy/commit/3a630c07e1521abf63a1b9ea080509aa1337b60d"},{"type":"REPORT","url":"https://github.com/ninenines/cowboy/commit/faf5594fbf74530ace90b0c46c936bdc2cf82081"},{"type":"REPORT","url":"https://osv.dev/vulnerability/EEF-CVE-2026-115701"}],"affected":[{"package":{"name":"its","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/its?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.8-5"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.8-5","binary_name":"r-cran-its"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115701.json"}},{"package":{"name":"its","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/its?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.8-6build1","1.1.8-6.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.8-6.1","binary_name":"r-cran-its"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115701.json"}},{"package":{"name":"its","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/its?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.8-7"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.8-7","binary_name":"r-cran-its"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115701.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}