{"answers":{"affected":"3 open source packages ship an affected version, including bandit.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39805 exists.","fix":"Upgrade bandit to 1.11.0 or later.","what":"CVE-2026-39805 is a medium-severity vulnerability in mtrudel bandit, published on 1 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-39805 and fix it if it is affected.\n\nWhat it is: CVE-2026-39805 is a medium-severity vulnerability in mtrudel bandit, published on 1 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39805 exists.\n\nAffected packages and fixed versions:\n- bandit (Hex): affected all versions; fixed in 1.11.0\n- bandit (Hex): affected all versions; fixed in 1.11.0\n- bandit (Hex): affected from 0.1.0; fixed in 1.11.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-39805/ (Markdown: https://insights.sbomify.com/CVE-2026-39805/index.md)","id":"CVE-2026-39805","markdown":"https://insights.sbomify.com/CVE-2026-39805/index.md","name":"CVE-2026-39805","record":{"aliases":["EEF-CVE-2026-39805","GHSA-c67r-gc9j-2qf7"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Elixir HTTP server","requires_auth":"none","summary":"An attacker can smuggle HTTP requests past security controls by exploiting inconsistent Content-Length header handling in the Bandit server.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"EEF","cpe":[],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"description":"Inconsistent Interpretation of HTTP Requests vulnerability in mtrudel bandit allows HTTP request smuggling via duplicate Content-Length headers.\n\n'Elixir.Bandit.Headers':get_content_length/1 in lib/bandit/headers.ex uses List.keyfind/3, which returns only the first matching header. When a request contains two Content-Length headers with different values, Bandit silently accepts it, uses the first value to read the body, and dispatches the remaining bytes as a second pipelined request on the same keep-alive connection. RFC 9112 §6.3 requires recipients to treat this as an unrecoverable framing error.\n\nWhen Bandit sits behind a proxy that picks the last Content-Length value and forwards the request rather than rejecting it, an unauthenticated attacker can smuggle requests past edge WAF rules, path-based ACLs, rate limiting, and audit logging.\n\nThis issue affects bandit: before 1.11.0.","ecosystems":["Hex"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"CL.CL HTTP request smuggling via duplicate Content-Length in bandit","id":"CVE-2026-39805","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":"other","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"HTTP/1 chunked decoder infinite loop on requests with trailer fields in bandit","id":"CVE-2026-39806"},"packages":[{"ecosystem":"Hex","fixed":["1.11.0"],"introduced":["0"],"last_affected":[],"package":"bandit","purl":null,"source":"GHSA-c67r-gc9j-2qf7"},{"ecosystem":"Hex","fixed":["1.11.0"],"introduced":["0"],"last_affected":[],"package":"bandit","purl":"pkg:hex/bandit","source":"GHSA-c67r-gc9j-2qf7"},{"ecosystem":"Hex","fixed":["1.11.0"],"introduced":["0.1.0"],"last_affected":[],"package":"bandit","purl":"pkg:hex/bandit","source":"EEF-CVE-2026-39805"}],"prev":{"headline":"WebSocket permessage-deflate inflate has no output-size cap in bandit","id":"CVE-2026-39804"},"products":["bandit"],"published":"2026-05-01","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Erlang Ecosystem Foundation","prefix":"EEF"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-24","vendors":["mtrudel"]},"summary":"An attacker can smuggle HTTP requests past security controls by exploiting inconsistent Content-Length header handling in the Bandit server.","url":"https://insights.sbomify.com/CVE-2026-39805/"}