{"answers":{"affected":"4 open source packages ship an affected version, including undici. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-9678 in the wild and no public exploit code.","fix":"Upgrade undici to a fixed version for your release line: 7.28.0 or 8.5.0.","what":"CVE-2026-9678 is a medium-severity vulnerability in Nodejs Undici, published on 17 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-2026-9678 and fix it if it is affected.\n\nWhat it is: CVE-2026-9678 is a medium-severity vulnerability in Nodejs Undici, published on 17 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-2026-9678 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- undici (npm): affected from 7.0.0; fixed in 7.28.0\n- undici (npm): affected from 7.0.0; fixed in 7.28.0\n- undici (npm): affected from 8.0.0; fixed in 8.5.0\n- undici (npm): affected from 8.0.0; fixed in 8.5.0\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-2026-9678/ (Markdown: https://insights.sbomify.com/CVE-2026-9678/index.md)","id":"CVE-2026-9678","markdown":"https://insights.sbomify.com/CVE-2026-9678/index.md","name":"CVE-2026-9678","record":{"aliases":["DEBIAN-CVE-2026-9678","ECHO-8994-d1aa-91ab","GHSA-pr7r-676h-xcf6","MINI-37m7-pqxf-864q","MINI-49jg-32vr-h3xx","MINI-4qj9-vj73-vfwv","MINI-889v-6gfm-7m7f","MINI-9v53-87mm-5558","MINI-h6g2-vvqj-f842","MINI-jq4w-j69r-85c3","MINI-qjf7-6v96-prcg","MINI-xq7w-v4r8-wp6r","ROOT-APP-NPM-CVE-2026-9678","UBUNTU-CVE-2026-9678"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"Node.js HTTP client","requires_auth":"none","summary":"Attackers can read other users' authenticated data via shared cache when whitespace-padded cache headers bypass security checks in undici.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"openjs","cpe":[{"product":"undici","vendor":"nodejs"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-524","name":"Use of Cache Containing Sensitive Information"}],"description":"Impact:\nUndici's cache interceptor incorrectly classifies some responses as cacheable when the upstream Cache-Control header uses whitespace-padded qualified private or no-cache field names such as private=\" authorization\" or no-cache=\"\\tauthorization\". The parser preserves the surrounding whitespace, so later comparisons against the literal authorization field name fail and the response is stored.\n\nIn shared-cache mode, this allows a response containing one user's authenticated data to be served from cache to a subsequent caller, including an unauthenticated caller, when both requests resolve to the same cache key.\n\nAffected applications are those that explicitly enable the cache interceptor (interceptors.cache()) in shared mode, forward Authorization headers upstream, and receive cacheable responses with non-canonical qualified private or no-cache directives.\n\nPatches:\nUpgrade to undici v7.28.0 or v8.5.0.\n\nWorkarounds:\nIf upgrade is not immediately possible, disable shared-cache mode for traffic that includes Authorization headers, avoid caching responses to authenticated requests, or add Vary: Authorization upstream.","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":"undici vulnerable to cross-user information disclosure via shared cache whitespace bypass","id":"CVE-2026-9678","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"nodejs:undici","products":["nodejs:undici"],"type":"information_disclosure","year":"2026"},"n_packages":4,"n_references":2,"next":{"headline":"undici vulnerable to HTTP header injection via Set-Cookie percent-decoding","id":"CVE-2026-9679"},"packages":[{"ecosystem":"npm","fixed":["7.28.0"],"introduced":["7.0.0"],"last_affected":[],"package":"undici","purl":null,"source":"GHSA-pr7r-676h-xcf6"},{"ecosystem":"npm","fixed":["7.28.0"],"introduced":["7.0.0"],"last_affected":[],"package":"undici","purl":"pkg:npm/undici","source":"GHSA-pr7r-676h-xcf6"},{"ecosystem":"npm","fixed":["8.5.0"],"introduced":["8.0.0"],"last_affected":[],"package":"undici","purl":null,"source":"GHSA-pr7r-676h-xcf6"},{"ecosystem":"npm","fixed":["8.5.0"],"introduced":["8.0.0"],"last_affected":[],"package":"undici","purl":"pkg:npm/undici","source":"GHSA-pr7r-676h-xcf6"}],"prev":{"headline":"Shariff for WordPress \u003c= 1.0.11 - Admin+ Stored Cross-Site Scripting","id":"CVE-2026-9677"},"products":["undici"],"published":"2026-06-17","related":[{"cvss_score":7.5,"headline":"undici WebSocket client vulnerable to Denial of Service via failed HTTP/2 handshake","id":"CVE-2026-109855","kev_date_added":null,"published":"2026-10-15"},{"cvss_score":7.5,"headline":"undici vulnerable to Denial of Service via unhandled error on excessive content-encodings","id":"CVE-2026-109869","kev_date_added":null,"published":"2026-10-15"},{"cvss_score":7.5,"headline":"undici vulnerable to Denial of Service via TLS 1.2 certificate-changing renegotiation","id":"CVE-2026-87018","kev_date_added":null,"published":"2026-10-15"},{"cvss_score":7.5,"headline":"undici vulnerable to Denial of Service via unrequested WebSocket subprotocol","id":"CVE-2026-19534","kev_date_added":null,"published":"2026-09-04"},{"cvss_score":7.5,"headline":"undici WebSocket client vulnerable to denial of service via fragment count bypass","id":"CVE-2026-12151","kev_date_added":null,"published":"2026-06-17"},{"cvss_score":7.5,"headline":"undici vulnerable to cross-origin request routing via SOCKS5 proxy pool reuse","id":"CVE-2026-6734","kev_date_added":null,"published":"2026-06-17"},{"cvss_score":7.5,"headline":"undici WebSocket client vulnerable to denial of service via cumulative fragment bypass","id":"CVE-2026-9675","kev_date_added":null,"published":"2026-06-17"}],"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":"2026-06-17","vendors":["undici"]},"summary":"Attackers can read other users' authenticated data via shared cache when whitespace-padded cache headers bypass security checks in undici.","url":"https://insights.sbomify.com/CVE-2026-9678/"}