{"answers":{"affected":"1 open source package ship an affected version, including @hono/node-server.","exploited":"There is no known exploitation of CVE-2026-126343 in the wild and no public exploit code.","exposure":"An affected version is only exploitable if your software uses the vulnerable function or option. Many projects that include it are not exposed.","fix":"Upgrade @hono/node-server to 2.1.6 or later.","what":"CVE-2026-126343 is a medium-severity denial of service vulnerability in honojs node-server, published on 12 Nov 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-2026-126343 and fix it if it is affected.\n\nWhat it is: CVE-2026-126343 is a medium-severity denial of service vulnerability in honojs node-server, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-126343 in the wild and no public exploit code.\nExposure: An affected version is only exploitable if your software uses the vulnerable function or option. Many projects that include it are not exposed.\n\nAffected packages and fixed versions:\n- @hono/node-server (npm): affected from 2.0.0; fixed in 2.1.6\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-2026-126343/ (Markdown: https://insights.sbomify.com/CVE-2026-126343/index.md)","id":"CVE-2026-126343","markdown":"https://insights.sbomify.com/CVE-2026-126343/index.md","name":"CVE-2026-126343","record":{"aliases":["GHSA-qv5m-9pm6-hqp3"],"analysis":{"component_type":"library","exploitable_when_present":false,"fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Node.js web framework","requires_auth":"none","requires_specific_call":true,"summary":"Unauthenticated clients resetting a WebSocket connection during async upgrade work can crash Hono Node.js apps with WebSocket support enabled.","user_interaction":"not_required","vuln_class":"denial_of_service","vulnerable_functions":[]},"analysis_generated_by":"sbomify/insights-2b-fp8","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-248","name":"Uncaught Exception"}],"description":"@hono/node-server allows running the Hono application on Node.js. From 2.0.0 until 2.1.6, the WebSocket upgrade handler waits for the Hono application to finish asynchronous middleware or handler work without first attaching an error listener to the socket. If an unauthenticated client resets the TCP connection during that window, the socket emits an unhandled ECONNRESET error and terminates the Node.js process. If a global uncaughtException handler suppresses termination, the pending upgrade waiter is not released and repeated requests can grow the heap. This affects applications that enable WebSocket support and perform asynchronous work on the upgrade path. This issue is fixed in version 2.1.6.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"@hono/node-server: Unhandled `ECONNRESET` on the socket during an asynchronous WebSocket upgrade crashes the process","id":"CVE-2026-126343","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":1,"n_references":3,"next":{"headline":"Cross-site request forgery in node-server","id":"CVE-2026-126344"},"nickname":null,"packages":[{"ecosystem":"npm","fixed":["2.1.6"],"introduced":["2.0.0"],"last_affected":[],"package":"@hono/node-server","purl":null,"source":"GHSA-qv5m-9pm6-hqp3"}],"prev":{"headline":"Missing authorization in Server","id":"CVE-2026-126332"},"products":["node-server"],"published":"2026-11-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-12","vendors":["honojs"]},"summary":"Unauthenticated clients resetting a WebSocket connection during async upgrade work can crash Hono Node.js apps with WebSocket support enabled.","url":"https://insights.sbomify.com/CVE-2026-126343/"}