{"answers":{"affected":"2 open source packages ship an affected version, including rack. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-26962 in the wild and no public exploit code.","fix":"Upgrade rack to 3.2.6 or later.","what":"CVE-2026-26962 is a medium-severity vulnerability in rack, published on 2 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-2026-26962 and fix it if it is affected.\n\nWhat it is: CVE-2026-26962 is a medium-severity vulnerability in rack, published on 2 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-2026-26962 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rack (RubyGems): affected from 3.2.0; fixed in 3.2.6\n- rack (RubyGems): affected from 3.2.0; fixed in 3.2.6\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-2026-26962/ (Markdown: https://insights.sbomify.com/CVE-2026-26962/index.md)","id":"CVE-2026-26962","markdown":"https://insights.sbomify.com/CVE-2026-26962/index.md","name":"CVE-2026-26962","record":{"aliases":["DEBIAN-CVE-2026-26962","GHSA-rx22-g9mx-qrhv","MINI-3493-hh35-8q5w","MINI-73h8-3r33-8w27","MINI-c2wf-6545-wqvp","MINI-f7j9-m4hx-x6pc","MINI-w224-mvmm-cpj8","UBUNTU-CVE-2026-26962"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["other"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby web server interface","requires_auth":"none","summary":"Attackers can inject headers via multipart requests in Rack, potentially causing response splitting in applications using affected versions.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"rack","vendor":"rack"}],"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-93","name":"Improper Neutralization of CRLF Sequences"}],"description":"Rack is a modular Ruby web server interface. From version 3.2.0 to before version 3.2.6, Rack::Multipart::Parser unfolds folded multipart part headers incorrectly. When a multipart header contains an obs-fold sequence, Rack preserves the embedded CRLF in parsed parameter values such as filename or name instead of removing the folded line break during unfolding. As a result, applications that later reuse those parsed values in HTTP response headers may be vulnerable to downstream header injection or response splitting. This issue has been patched in version 3.2.6.","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: Header injection in multipart requests","id":"CVE-2026-26962","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":"other","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled","id":"CVE-2026-26963"},"packages":[{"ecosystem":"RubyGems","fixed":["3.2.6"],"introduced":["3.2.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-rx22-g9mx-qrhv"},{"ecosystem":"RubyGems","fixed":["3.2.6"],"introduced":["3.2.0"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-rx22-g9mx-qrhv"}],"prev":{"headline":"Rack: Multipart Boundary Parsing Ambiguity allowing WAF Bypass","id":"CVE-2026-26961"},"products":["rack"],"published":"2026-04-02","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"},{"cvss_score":7.5,"headline":"Rack's multipart parser buffers large non‑file fields entirely in memory, enabling DoS (memory exhaustion)","id":"CVE-2025-61771","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-03","vendors":["rack"]},"summary":"Attackers can inject headers via multipart requests in Rack, potentially causing response splitting in applications using affected versions.","url":"https://insights.sbomify.com/CVE-2026-26962/"}