{"answers":{"affected":"2 open source packages ship an affected version, including undici. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-2581 in the wild and no public exploit code.","fix":"Upgrade undici to 7.24.0 or later.","what":"CVE-2026-2581 is a medium-severity denial of service vulnerability in Nodejs Undici, published on 12 Mar 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-2026-2581 and fix it if it is affected.\n\nWhat it is: CVE-2026-2581 is a medium-severity denial of service vulnerability in Nodejs Undici, published on 12 Mar 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-2026-2581 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- undici (npm): affected from 7.17.0; fixed in 7.24.0\n- undici (npm): affected from 7.17.0; fixed in 7.24.0\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-2026-2581/ (Markdown: https://insights.sbomify.com/CVE-2026-2581/index.md)","id":"CVE-2026-2581","markdown":"https://insights.sbomify.com/CVE-2026-2581/index.md","name":"CVE-2026-2581","record":{"aliases":["BELL-CVE-2026-2581","CLEANSTART-2026-DD51725","CLEANSTART-2026-JE55781","DEBIAN-CVE-2026-2581","GHSA-phc3-fgpg-7m6h","MINI-cpgq-7mgg-j4vp","MINI-gp5q-f64j-5cgr","MINI-w9v4-2prx-cq3h","UBUNTU-CVE-2026-2581"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Node.js HTTP client","requires_auth":"none","summary":"An attacker can cause denial of service via memory exhaustion in Undici's deduplication interceptor when enabled, requiring an upgrade to patched versions.","user_interaction":"not_required","vuln_class":"denial_of_service"},"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:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"This is an uncontrolled resource consumption vulnerability (CWE-400) that can lead to Denial of Service (DoS).\n\nIn vulnerable Undici versions, when interceptors.deduplicate() is enabled, response data for deduplicated requests could be accumulated in memory for downstream handlers. An attacker-controlled or untrusted upstream endpoint can exploit this with large/chunked responses and concurrent identical requests, causing high memory usage and potential OOM process termination.\n\nImpacted users are applications that use Undici’s deduplication interceptor against endpoints that may produce large or long-lived response bodies.\n\nPatchesThe issue has been patched by changing deduplication behavior to stream response chunks to downstream handlers as they arrive (instead of full-body accumulation), and by preventing late deduplication when body streaming has already started.\n\nUsers should upgrade to the first official Undici (and Node.js, where applicable) releases that include this patch.","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 has Unbounded Memory Consumption in its DeduplicationHandler via Response Buffering that leads to DoS","id":"CVE-2026-2581","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"nodejs:undici","products":["nodejs:undici"],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Germanized for WooCommerce \u003c= 3.20.5 - Unauthenticated Arbitrary Shortcode Execution","id":"CVE-2026-2582"},"packages":[{"ecosystem":"npm","fixed":["7.24.0"],"introduced":["7.17.0"],"last_affected":[],"package":"undici","purl":null,"source":"GHSA-phc3-fgpg-7m6h"},{"ecosystem":"npm","fixed":["7.24.0"],"introduced":["7.17.0"],"last_affected":[],"package":"undici","purl":"pkg:npm/undici","source":"GHSA-phc3-fgpg-7m6h"}],"prev":{"headline":"SQL injection in WP Maps – Store Locator,Google Maps,OpenStreetMap,Mapbox,Listing,Directory \u0026 Filters","id":"CVE-2026-2580"},"products":["undici"],"published":"2026-03-12","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":"2026-03-13","vendors":["undici"]},"summary":"An attacker can cause denial of service via memory exhaustion in Undici's deduplication interceptor when enabled, requiring an upgrade to patched versions.","url":"https://insights.sbomify.com/CVE-2026-2581/"}