{"answers":{"affected":"4 open source packages ship an affected version, including rack. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-32762 in the wild and no public exploit code.","fix":"Upgrade rack to a fixed version for your release line: 3.1.21 or 3.2.6.","what":"CVE-2026-32762 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-2026-32762 and fix it if it is affected.\n\nWhat it is: CVE-2026-32762 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-2026-32762 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rack (RubyGems): affected from 3.0.0.beta1; fixed in 3.1.21\n- rack (RubyGems): affected from 3.0.0.beta1; fixed in 3.1.21\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-2026-32762/ (Markdown: https://insights.sbomify.com/CVE-2026-32762/index.md)","id":"CVE-2026-32762","markdown":"https://insights.sbomify.com/CVE-2026-32762/index.md","name":"CVE-2026-32762","record":{"aliases":["DEBIAN-CVE-2026-32762","GHSA-qfgr-crr9-7r49","MINI-2hx7-7g42-3qh9","MINI-5335-wxcw-wqw4","MINI-56gq-94r3-mc3j","MINI-7495-62jj-x2mv","MINI-898x-rp7w-wv99","MINI-9mwp-44qv-gvxj","MINI-cxh3-m8g2-6mqj","MINI-f445-rvhg-9f4c","MINI-gqx5-59qf-6x7j","MINI-q59w-jh25-77rc","MINI-rqh5-9pgc-6fx6","UBUNTU-CVE-2026-32762"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Ruby web server interface","requires_auth":"none","summary":"Attackers can spoof Host and Scheme headers via semicolon injection in Rack's Forwarded header parsing, bypassing upstream proxy or WAF validation.","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-436","name":"Interpretation Conflict"}],"description":"Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwarded_values parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons, a header can be interpreted by Rack as multiple Forwarded directives rather than as a single quoted for value. In deployments where an upstream proxy, WAF, or intermediary validates or preserves quoted Forwarded values differently, this discrepancy can allow an attacker to smuggle host, proto, for, or by parameters through a single header value. This issue has been patched in versions 3.1.21 and 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: Forwarded Header semicolon injection enables Host and Scheme spoofing","id":"CVE-2026-32762","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":"other","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"SQL Injection via unsanitized JSON path keys when ignoring/silencing compilation errors or using `Kysely\u003cany\u003e`.","id":"CVE-2026-32763"},"packages":[{"ecosystem":"RubyGems","fixed":["3.1.21"],"introduced":["3.0.0.beta1"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-qfgr-crr9-7r49"},{"ecosystem":"RubyGems","fixed":["3.1.21"],"introduced":["3.0.0.beta1"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-qfgr-crr9-7r49"},{"ecosystem":"RubyGems","fixed":["3.2.6"],"introduced":["3.2.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-qfgr-crr9-7r49"},{"ecosystem":"RubyGems","fixed":["3.2.6"],"introduced":["3.2.0"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-qfgr-crr9-7r49"}],"prev":{"headline":"File Browser has an Authorization Policy Bypass in its Public Share Download Flow","id":"CVE-2026-32761"},"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":"2026-04-02","vendors":["rack"]},"summary":"Attackers can spoof Host and Scheme headers via semicolon injection in Rack's Forwarded header parsing, bypassing upstream proxy or WAF validation.","url":"https://insights.sbomify.com/CVE-2026-32762/"}