{"answers":{"affected":"6 open source packages ship an affected version, including rack. It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-61771 in the wild and no public exploit code.","fix":"Upgrade rack to a fixed version for your release line: 2.2.19, 3.1.17 or 3.2.2.","what":"CVE-2025-61771 is a high-severity denial of service vulnerability in rack, published on 7 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-61771 and fix it if it is affected.\n\nWhat it is: CVE-2025-61771 is a high-severity denial of service vulnerability in rack, published on 7 Oct 2025. 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-2025-61771 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rack (RubyGems): affected all versions; fixed in 2.2.19\n- rack (RubyGems): affected all versions; fixed in 2.2.19\n- rack (RubyGems): affected from 3.1; fixed in 3.1.17\n- rack (RubyGems): affected from 3.1; fixed in 3.1.17\n- rack (RubyGems): affected from 3.2; fixed in 3.2.2\n- rack (RubyGems): affected from 3.2; fixed in 3.2.2\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-2025-61771/ (Markdown: https://insights.sbomify.com/CVE-2025-61771/index.md)","id":"CVE-2025-61771","markdown":"https://insights.sbomify.com/CVE-2025-61771/index.md","name":"CVE-2025-61771","record":{"aliases":["CLEANSTART-2026-HZ91324","CLEANSTART-2026-VI91152","DEBIAN-CVE-2025-61771","GHSA-w9pc-fmgc-vxvw","MINI-382j-c87r-7rvc","MINI-592p-9jxp-2p74","MINI-h38j-3m72-87f3","MINI-h62q-5xqq-x5h7","MINI-hgrr-vhrm-cphg","MINI-jj87-wjj4-h394","MINI-jjgh-9h82-h979","MINI-mwmc-5f5j-643v","MINI-p446-j28m-6qp3","MINI-qrrp-37r3-hxp5","MINI-vcqq-8mjq-jphf","MINI-vwhg-84x7-m786","MINI-vx4j-q9f6-hcrj","MINI-wrrh-w4mw-qmhp","UBUNTU-CVE-2025-61771"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby web server interface","requires_auth":"none","summary":"Attackers can cause denial of service by sending large non-file fields in multipart requests, exhausting memory in Rack applications.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"rack","vendor":"rack"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, ``Rack::Multipart::Parser` stores non-file form fields (parts without a `filename`) entirely in memory as Ruby `String` objects. A single large text field in a multipart/form-data request (hundreds of megabytes or more) can consume equivalent process memory, potentially leading to out-of-memory (OOM) conditions and denial of service (DoS). Attackers can send large non-file fields to trigger excessive memory usage. Impact scales with request size and concurrency, potentially leading to worker crashes or severe garbage-collection overhead. All Rack applications processing multipart form submissions are affected. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a reasonable size cap for non-file fields (e.g., 2 MiB). Workarounds include restricting maximum request body size at the web-server or proxy layer (e.g., Nginx `client_max_body_size`) and validating and rejecting unusually large form fields at the application level.","ecosystems":["RubyGems"],"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":"Rack's multipart parser buffers large non‑file fields entirely in memory, enabling DoS (memory exhaustion)","id":"CVE-2025-61771","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":"denial_of_service","year":"2025"},"n_packages":6,"n_references":4,"next":{"headline":"Rack's multipart parser buffers unbounded per-part headers, enabling DoS (memory exhaustion)","id":"CVE-2025-61772"},"packages":[{"ecosystem":"RubyGems","fixed":["2.2.19"],"introduced":["0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-w9pc-fmgc-vxvw"},{"ecosystem":"RubyGems","fixed":["2.2.19"],"introduced":["0"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-w9pc-fmgc-vxvw"},{"ecosystem":"RubyGems","fixed":["3.1.17"],"introduced":["3.1"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-w9pc-fmgc-vxvw"},{"ecosystem":"RubyGems","fixed":["3.1.17"],"introduced":["3.1"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-w9pc-fmgc-vxvw"},{"ecosystem":"RubyGems","fixed":["3.2.2"],"introduced":["3.2"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-w9pc-fmgc-vxvw"},{"ecosystem":"RubyGems","fixed":["3.2.2"],"introduced":["3.2"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-w9pc-fmgc-vxvw"}],"prev":{"headline":"Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)","id":"CVE-2025-61770"},"products":["rack"],"published":"2025-10-07","related":[{"cvss_score":7.5,"headline":"Rack: Local file inclusion in `Rack::Static` via URL Prefix Matching","id":"CVE-2026-34785","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":7.5,"headline":"Rack: Algorithmic-Complexity DoS in Rack::Multipart::Parser","id":"CVE-2026-34827","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":7.5,"headline":"Rack: Denial of Service via Unbounded Multipart File Upload Without Content-Length","id":"CVE-2026-34829","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":7.5,"headline":"Rack has a Directory Traversal via Rack:Directory","id":"CVE-2026-22860","kev_date_added":null,"published":"2026-02-18"},{"cvss_score":7.5,"headline":"Rack is vulnerable to a memory-exhaustion DoS through unbounded URL-encoded body parsing","id":"CVE-2025-61919","kev_date_added":null,"published":"2025-10-10"},{"cvss_score":7.5,"headline":"Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)","id":"CVE-2025-61770","kev_date_added":null,"published":"2025-10-07"}],"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":"2025-10-07","vendors":["rack"]},"summary":"Attackers can cause denial of service by sending large non-file fields in multipart requests, exhausting memory in Rack applications.","url":"https://insights.sbomify.com/CVE-2025-61771/"}