{"answers":{"affected":"2 open source packages ship an affected version, including hono. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-39408 in the wild and no public exploit code.","fix":"Upgrade hono to 4.12.12 or later.","what":"CVE-2026-39408 is a medium-severity path traversal vulnerability in honojs hono, published on 8 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-39408 and fix it if it is affected.\n\nWhat it is: CVE-2026-39408 is a medium-severity path traversal vulnerability in honojs hono, published on 8 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-39408 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- hono (npm): affected from 4.0.0; fixed in 4.12.12\n- hono (npm): affected from 4.0.0; fixed in 4.12.12\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-2026-39408/ (Markdown: https://insights.sbomify.com/CVE-2026-39408/index.md)","id":"CVE-2026-39408","markdown":"https://insights.sbomify.com/CVE-2026-39408/index.md","name":"CVE-2026-39408","record":{"aliases":["CLEANSTART-2026-BO90613","CLEANSTART-2026-FT94071","GHSA-xf4j-xp2r-rqqx","MINI-3324-w2w9-v95f","MINI-3jvg-wcg2-r32h","MINI-6r4g-m2p5-hxhm","MINI-gmq3-6v89-cc2j","MINI-wfgw-fxgc-3hqf","MINI-wmjx-f2gp-vm9w","MINI-wv7v-r7hw-2hv9"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"JavaScript web framework","requires_auth":"none","summary":"Attackers can write files outside the intended output directory during static site generation using crafted dynamic route parameters in Hono.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"hono","vendor":"hono"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path traversal issue in toSSG() allows files to be written outside the configured output directory during static site generation. When using dynamic route parameters via ssgParams, specially crafted values can cause generated file paths to escape the intended output directory. This vulnerability is fixed in 4.12.12.","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 has a path traversal in toSSG() allows writing files outside the output directory","id":"CVE-2026-39408","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Hono has incorrect IP matching in ipRestriction() for IPv4-mapped IPv6 addresses","id":"CVE-2026-39409"},"packages":[{"ecosystem":"npm","fixed":["4.12.12"],"introduced":["4.0.0"],"last_affected":[],"package":"hono","purl":null,"source":"GHSA-xf4j-xp2r-rqqx"},{"ecosystem":"npm","fixed":["4.12.12"],"introduced":["4.0.0"],"last_affected":[],"package":"hono","purl":"pkg:npm/hono","source":"GHSA-xf4j-xp2r-rqqx"}],"prev":{"headline":"Hono has a middleware bypass via repeated slashes in serveStatic","id":"CVE-2026-39407"},"products":["hono"],"published":"2026-04-08","related":[{"cvss_score":8.2,"headline":"Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo","id":"CVE-2026-27700","kev_date_added":null,"published":"2026-02-25"},{"cvss_score":8.2,"headline":"JWT Algorithm Confusion via Unsafe Default (HS256) in Hono JWT Middleware Allows Token Forgery and Auth Bypass","id":"CVE-2026-22817","kev_date_added":null,"published":"2026-01-13"},{"cvss_score":8.2,"headline":"JWT algorithm confusion in Hono JWK Auth Middleware when JWK lacks \"alg\" (untrusted header.alg fallback)","id":"CVE-2026-22818","kev_date_added":null,"published":"2026-01-13"},{"cvss_score":8.1,"headline":"Hono Improperly Authorizes JWT Audience Validation","id":"CVE-2025-62610","kev_date_added":null,"published":"2025-10-22"},{"cvss_score":7.5,"headline":"Hono: Arbitrary file access via serveStatic vulnerability","id":"CVE-2026-29045","kev_date_added":null,"published":"2026-03-04"},{"cvss_score":7.5,"headline":"Hono contains a flaw in URL path parsing, potentially leading to path confusion","id":"CVE-2025-58362","kev_date_added":null,"published":"2025-09-04"},{"cvss_score":6.5,"headline":"hono/jsx does not isolate context per request, leading to cross-request data disclosure","id":"CVE-2026-59896","kev_date_added":null,"published":"2026-07-08"}],"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":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-10","vendors":["honojs"]},"summary":"Attackers can write files outside the intended output directory during static site generation using crafted dynamic route parameters in Hono.","url":"https://insights.sbomify.com/CVE-2026-39408/"}