{"answers":{"affected":"2 open source packages ship an affected version, including hono.","exploited":"There is no known exploitation of CVE-2026-54287 in the wild and no public exploit code.","fix":"Upgrade hono to 4.12.25 or later.","what":"CVE-2026-54287 is a medium-severity vulnerability in honojs hono, published on 22 Jun 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-2026-54287 and fix it if it is affected.\n\nWhat it is: CVE-2026-54287 is a medium-severity vulnerability in honojs hono, published on 22 Jun 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-2026-54287 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- hono (npm): affected all versions; fixed in 4.12.25\n- hono (npm): affected all versions; fixed in 4.12.25\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-2026-54287/ (Markdown: https://insights.sbomify.com/CVE-2026-54287/index.md)","id":"CVE-2026-54287","markdown":"https://insights.sbomify.com/CVE-2026-54287/index.md","name":"CVE-2026-54287","record":{"aliases":["ECHO-55ba-b30a-0691","GHSA-j6c9-x7qj-28xf","MINI-2hgr-73jr-9f2r","MINI-2rjm-4g68-57c6","MINI-78g2-r3mc-p2p4","MINI-7vm2-xw2w-6ggp","MINI-85pj-wj5p-9x92","MINI-c944-vmf6-xmxm","MINI-cc45-f2x5-8rhh","MINI-hf8x-63c9-g428","MINI-hh2p-f623-42fr","MINI-q2wp-m5pp-mm2j","MINI-xgx3-mxw9-qchw","MINI-xm64-gx99-347q","ROOT-APP-NPM-CVE-2026-54287"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Hono web framework","requires_auth":"none","summary":"Hono framework incorrectly merges Set-Cookie headers on AWS Lambda, causing clients to drop cookies and potentially bypass authentication or session controls.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","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:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-116","name":"Improper Encoding or Escaping of Output"}],"description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda, the ALB single-header response and the VPC Lattice v2 response join multiple Set-Cookie headers into one comma-separated value. Because commas also appear inside cookie attributes (for example Expires dates), clients cannot split the value back into individual cookies and silently drop or misparse them. This vulnerability is fixed in 4.12.25.","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: AWS Lambda adapter merges multiple `Set-Cookie` headers into one value, dropping cookies on ALB single-header and Lattice","id":"CVE-2026-54287","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Hono: Body Limit Middleware can be bypassed on AWS Lambda by understating `Content-Length`","id":"CVE-2026-54288"},"packages":[{"ecosystem":"npm","fixed":["4.12.25"],"introduced":["0"],"last_affected":[],"package":"hono","purl":null,"source":"GHSA-j6c9-x7qj-28xf"},{"ecosystem":"npm","fixed":["4.12.25"],"introduced":["0"],"last_affected":[],"package":"hono","purl":"pkg:npm/hono","source":"GHSA-j6c9-x7qj-28xf"}],"prev":{"headline":"Hono: Path traversal in `serve-static` on Windows via encoded backslash (`%5C`)","id":"CVE-2026-54286"},"products":["hono"],"published":"2026-06-22","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-22","vendors":["honojs"]},"summary":"Hono framework incorrectly merges Set-Cookie headers on AWS Lambda, causing clients to drop cookies and potentially bypass authentication or session controls.","url":"https://insights.sbomify.com/CVE-2026-54287/"}