{"answers":{"affected":"2 open source packages ship an affected version, including hono. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-39410 in the wild and no public exploit code.","fix":"Upgrade hono to 4.12.12 or later.","what":"CVE-2026-39410 is a medium-severity vulnerability in honojs hono, published on 8 Apr 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-2026-39410 and fix it if it is affected.\n\nWhat it is: CVE-2026-39410 is a medium-severity vulnerability in honojs hono, published on 8 Apr 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-2026-39410 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- hono (npm): affected all versions; fixed in 4.12.12\n- hono (npm): affected all versions; 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-2026-39410/ (Markdown: https://insights.sbomify.com/CVE-2026-39410/index.md)","id":"CVE-2026-39410","markdown":"https://insights.sbomify.com/CVE-2026-39410/index.md","name":"CVE-2026-39410","record":{"aliases":["CLEANSTART-2026-FR43043","CLEANSTART-2026-HB87291","GHSA-r5rp-j6wh-rvv4","MINI-653v-j5xq-fm5p","MINI-6q56-6rmp-227w","MINI-7m65-p6wq-w38q","MINI-83qr-9gwm-fmm6","MINI-hqjv-jwmw-272h","MINI-jvwg-wgh3-gg9h","MINI-vmxp-8h7v-f957","ROOT-APP-NPM-CVE-2026-39410"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript web framework","requires_auth":"none","summary":"Attackers can bypass cookie prefix protections in Hono by exploiting parsing discrepancies, allowing them to override legitimate cookies.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"hono","vendor":"hono"}],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a discrepancy between browser cookie parsing and parse() handling allows cookie prefix protections to be bypassed. Cookie names that are treated as distinct by the browser may be normalized to the same key by parse(), allowing attacker-controlled cookies to override legitimate ones. 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 non-breaking space prefix bypass in cookie name handling in getCookie()","id":"CVE-2026-39410","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"LobeHub has an unauthenticated authentication bypass on `webapi` routes via forgeable `X-lobe-chat-auth` header","id":"CVE-2026-39411"},"packages":[{"ecosystem":"npm","fixed":["4.12.12"],"introduced":["0"],"last_affected":[],"package":"hono","purl":null,"source":"GHSA-r5rp-j6wh-rvv4"},{"ecosystem":"npm","fixed":["4.12.12"],"introduced":["0"],"last_affected":[],"package":"hono","purl":"pkg:npm/hono","source":"GHSA-r5rp-j6wh-rvv4"}],"prev":{"headline":"Hono has incorrect IP matching in ipRestriction() for IPv4-mapped IPv6 addresses","id":"CVE-2026-39409"},"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-08","vendors":["honojs"]},"summary":"Attackers can bypass cookie prefix protections in Hono by exploiting parsing discrepancies, allowing them to override legitimate cookies.","url":"https://insights.sbomify.com/CVE-2026-39410/"}