{"answers":{"affected":"1 open source package ship an affected version, including basic-ftp.","exploited":"There is no known exploitation of CVE-2026-126345 in the wild and no public exploit code.","exposure":"An affected version is only exploitable if your software calls Client.list(). Many projects that include it are not exposed.","fix":"Upgrade basic-ftp to 6.2.4 or later.","what":"CVE-2026-126345 is a medium-severity denial of service vulnerability in patrickjuchli basic-ftp, 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-2026-126345 and fix it if it is affected.\n\nWhat it is: CVE-2026-126345 is a medium-severity denial of service vulnerability in patrickjuchli basic-ftp, 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-2026-126345 in the wild and no public exploit code.\nExposure: An affected version is only exploitable if your software calls Client.list(). Many projects that include it are not exposed.\n\nAffected packages and fixed versions:\n- basic-ftp (npm): affected all versions; fixed in 6.2.4\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.\n   If an affected version is present, also search the code for calls to Client.list() and report whether any exist.\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-2026-126345/ (Markdown: https://insights.sbomify.com/CVE-2026-126345/index.md)","id":"CVE-2026-126345","markdown":"https://insights.sbomify.com/CVE-2026-126345/index.md","name":"CVE-2026-126345","record":{"aliases":["GHSA-5pm8-86m8-9m6r"],"analysis":{"component_type":"library","exploitable_when_present":false,"fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js FTP client","requires_auth":"none","requires_specific_call":true,"summary":"A malicious FTP server can crash Node.js apps using basic-ftp by sending a __proto__ fact name that triggers an unhandled TypeError.","user_interaction":"not_required","vuln_class":"denial_of_service","vulnerable_functions":["Client.list()"]},"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"},{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"basic-ftp is an FTP client for Node.js. Prior to 6.2.4, the MLSD directory-listing parser in src/parseListMLSD.ts uses untrusted fact names from the FTP server as keys in the plain-object factHandlersByName dictionary without checking that the resolved property is an own handler. A fact named __proto__ therefore resolves to Object.prototype, bypasses the missing-handler guard, and is called as though it were a function, producing a TypeError. The error propagates through Client.list() and APIs that depend on it because it is not an FTPError. A malicious or compromised FTP server, or an on-path attacker on a plaintext FTP session, can make the affected operation reject, and the Node.js process terminates under the default behavior in Node.js 15 and later only if the application leaves that rejection unhandled. This issue is fixed in version 6.2.4.","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":"basic-ftp: Uncaught TypeError in MLSD directory-listing parser via __proto__ fact name causes DoS in Client.list()","id":"CVE-2026-126345","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":"basic-ftp: Uncaught exception crashes the Node.js process when a password (or resumed-download path) contains CR/LF","id":"CVE-2026-126346"},"nickname":null,"packages":[{"ecosystem":"npm","fixed":["6.2.4"],"introduced":["0"],"last_affected":[],"package":"basic-ftp","purl":null,"source":"GHSA-5pm8-86m8-9m6r"}],"prev":{"headline":"Cross-site request forgery in node-server","id":"CVE-2026-126344"},"products":["basic-ftp"],"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":["patrickjuchli"]},"summary":"A malicious FTP server can crash Node.js apps using basic-ftp by sending a __proto__ fact name that triggers an unhandled TypeError.","url":"https://insights.sbomify.com/CVE-2026-126345/"}