{"id":"CVE-2026-108525","aliases":[],"cve":{"records":[{"id":"CVE-2026-108525","source":"EEF","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-15T10:45:02.078Z","published":"2026-10-26T13:29:42.520Z","modified":"2026-10-26T15:35:52.227Z"}],"publishers":[{"name":"EEF","role":"CNA","organizationId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","modified":"2026-10-26T13:29:42.520Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-26T15:35:52.227Z"}],"references":[{"url":"https://github.com/mtrudel/bandit/security/advisories/GHSA-c3g7-2pg5-qvwh","tags":["vendor-advisory","related"],"source":"EEF"},{"url":"https://cna.erlef.org/cves/CVE-2026-108525.html","tags":["related"],"source":"EEF"},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-108525","tags":["related"],"source":"EEF"},{"url":"https://github.com/mtrudel/bandit/commit/c8dc1e97050cf359f61ed6cdd110f3cdaf1d6f5f","tags":["related"],"source":"EEF"},{"url":"https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a","tags":["patch"],"source":"EEF"}],"weaknesses":[{"id":"CWE-770","description":"CWE-770 Allocation of Resources Without Limits or Throttling","source":"EEF"}],"applicability":[{"source":"EEF","statements":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*","versionEndExcluding":"1.14.0","versionStartIncluding":"0.3.1","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"AND"}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-26T15:04:12.110479Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"HTTP/2 inbound flow control is not enforced, letting a client queue unbounded DATA in stream processes in Bandit","titleSource":"EEF","descriptionSource":"EEF","description":"Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/2 implementation of mtrudel bandit allows an unauthenticated remote attacker to exhaust server memory via DATA frames sent past the advertised receive window. The attacker requests a response larger than the 65,535-byte initial window and withholds WINDOW_UPDATE, so the stream process blocks while sending and stops reading, then floods small DATA frames on that stream. Every frame is queued in the stream's mailbox until the BEAM node runs out of memory.\n\nBandit.HTTP2.Connection.handle_frame/3 in lib/bandit/http2/connection.ex forwards each DATA frame to the stream process without consulting the receive window, and Bandit.HTTP2.FlowControl.compute_recv_window/2 replenishes the window as data arrives rather than as it is consumed, and never answers a violation with FLOW_CONTROL_ERROR.\n\nThis issue affects bandit: from 0.3.1 before 1.14.0.","score":8.7,"severity":"high","published":"2026-10-26T13:29:42.520Z","modified":"2026-10-26T15:35:52.227Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"mtrudel","name":"bandit","platforms":[],"versions":[{"version":"0.3.1","status":"affected","lessThan":"1.14.0","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:hex/bandit","packageIdentity":{"ecosystem":"Hex","name":"bandit"},"cpes":["cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"],"source":"EEF","url":"https://www.cve.org/CVERecord?id=CVE-2026-108525"},{"vendor":"mtrudel","name":"bandit","platforms":[],"versions":[{"version":"c8dc1e97050cf359f61ed6cdd110f3cdaf1d6f5f","status":"affected","lessThan":"220b9dfd27f9a21305be2afc75cbe585ddc24e7a","versionType":"git"}],"defaultStatus":"unaffected","packageURL":"pkg:github/mtrudel/bandit","cpes":["cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"],"source":"EEF","url":"https://www.cve.org/CVERecord?id=CVE-2026-108525"}],"remediation":[{"text":"From 0.7.0, disable HTTP/2 with http_2_options: [enabled: false], which removes the vulnerable path.","source":"EEF","url":"https://www.cve.org/CVERecord?id=CVE-2026-108525"}],"references":["https://github.com/mtrudel/bandit/security/advisories/GHSA-c3g7-2pg5-qvwh","https://cna.erlef.org/cves/CVE-2026-108525.html","https://osv.dev/vulnerability/EEF-CVE-2026-108525","https://github.com/mtrudel/bandit/commit/c8dc1e97050cf359f61ed6cdd110f3cdaf1d6f5f","https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a"],"sources":[{"name":"CVE","id":"CVE-2026-108525","modified":"2026-10-26T15:35:52.227Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-108525"}],"assessments":[{"source":"EEF","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","score":8.7}],"sourceAffected":[],"observedAt":"2026-10-29T14:27:11.391Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T09:10:30.844Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":{"text":"Bandit HTTP/2 implementation has an Allocation of Resources Without Limits or Throttling vulnerability, allowing an unauthenticated remote attacker to exhaust server memory. This affects bandit versions from 0.3.1 before 1.14.0. The attacker can send DATA frames past the advertised receive window, causing the stream process to block and queue frames until the server runs out of memory.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:36:43.897Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-108525"}]}}