{"answers":{"affected":"6 open source packages ship an affected version, including activestorage. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33174 in the wild and no public exploit code.","fix":"Upgrade activestorage to a fixed version for your release line: 7.2.3.1, 8.0.4.1 or 8.1.2.1.","what":"CVE-2026-33174 is a medium-severity denial of service vulnerability in Rubyonrails Rails, published on 23 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-2026-33174 and fix it if it is affected.\n\nWhat it is: CVE-2026-33174 is a medium-severity denial of service vulnerability in Rubyonrails Rails, published on 23 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-2026-33174 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- activestorage (RubyGems): affected all versions; fixed in 7.2.3.1\n- activestorage (RubyGems): affected all versions; fixed in 7.2.3.1\n- activestorage (RubyGems): affected from 8.0.0.beta1; fixed in 8.0.4.1\n- activestorage (RubyGems): affected from 8.0.0.beta1; fixed in 8.0.4.1\n- activestorage (RubyGems): affected from 8.1.0.beta1; fixed in 8.1.2.1\n- activestorage (RubyGems): affected from 8.1.0.beta1; fixed in 8.1.2.1\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-2026-33174/ (Markdown: https://insights.sbomify.com/CVE-2026-33174/index.md)","id":"CVE-2026-33174","markdown":"https://insights.sbomify.com/CVE-2026-33174/index.md","name":"CVE-2026-33174","record":{"aliases":["DEBIAN-CVE-2026-33174","GHSA-r46p-8f7g-vvvg","UBUNTU-CVE-2026-33174"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Rails Active Storage","requires_auth":"none","summary":"Attackers can cause memory exhaustion and denial of service in Rails applications using Active Storage proxy mode by sending large Range requests.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"rails","vendor":"rubyonrails"}],"cvss":{"score":6.6,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U","version":"4.0"},"cwes":[{"id":"CWE-789","name":"Memory Allocation with Excessive Size Value"}],"description":"Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. `bytes=0-`) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.","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":"Rails Active Storage has a possible DoS vulnerability when in proxy mode via Range requests","id":"CVE-2026-33174","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":"rubyonrails:rails","products":["rubyonrails:rails"],"type":"denial_of_service","year":"2026"},"n_packages":6,"n_references":7,"next":{"headline":"OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims","id":"CVE-2026-33175"},"packages":[{"ecosystem":"RubyGems","fixed":["7.2.3.1"],"introduced":["0"],"last_affected":[],"package":"activestorage","purl":null,"source":"GHSA-r46p-8f7g-vvvg"},{"ecosystem":"RubyGems","fixed":["7.2.3.1"],"introduced":["0"],"last_affected":[],"package":"activestorage","purl":"pkg:gem/activestorage","source":"GHSA-r46p-8f7g-vvvg"},{"ecosystem":"RubyGems","fixed":["8.0.4.1"],"introduced":["8.0.0.beta1"],"last_affected":[],"package":"activestorage","purl":null,"source":"GHSA-r46p-8f7g-vvvg"},{"ecosystem":"RubyGems","fixed":["8.0.4.1"],"introduced":["8.0.0.beta1"],"last_affected":[],"package":"activestorage","purl":"pkg:gem/activestorage","source":"GHSA-r46p-8f7g-vvvg"},{"ecosystem":"RubyGems","fixed":["8.1.2.1"],"introduced":["8.1.0.beta1"],"last_affected":[],"package":"activestorage","purl":null,"source":"GHSA-r46p-8f7g-vvvg"},{"ecosystem":"RubyGems","fixed":["8.1.2.1"],"introduced":["8.1.0.beta1"],"last_affected":[],"package":"activestorage","purl":"pkg:gem/activestorage","source":"GHSA-r46p-8f7g-vvvg"}],"prev":{"headline":"Rails Active Storage has possible content type bypass via metadata in direct uploads","id":"CVE-2026-33173"},"products":["activestorage"],"published":"2026-03-23","related":[{"cvss_score":10,"headline":"Active Record contains deserialization of arbitrary YAML","id":"CVE-2013-0277","kev_date_added":null,"published":"2013-02-13"},{"cvss_score":8.1,"headline":"SQL injection in n/a","id":"CVE-2017-17916","kev_date_added":null,"published":"2017-12-29"},{"cvss_score":8.1,"headline":"SQL injection in n/a","id":"CVE-2017-17917","kev_date_added":null,"published":"2017-12-29"},{"cvss_score":8,"headline":"Rails Active Storage has possible Path Traversal in DiskService","id":"CVE-2026-33195","kev_date_added":null,"published":"2026-03-23"},{"cvss_score":7.5,"headline":"Rails possible ReDoS vulnerability in Accept header parsing in Action Dispatch","id":"CVE-2024-26142","kev_date_added":null,"published":"2024-02-27"},{"cvss_score":7.5,"headline":"ReDoS based DoS vulnerability in Action Dispatch","id":"CVE-2023-22792","kev_date_added":null,"published":"2023-02-09"},{"cvss_score":7.5,"headline":"Denial of Service in Action Dispatch","id":"CVE-2021-22902","kev_date_added":null,"published":"2021-06-11"}],"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":"2026-03-24","vendors":["rails"]},"summary":"Attackers can cause memory exhaustion and denial of service in Rails applications using Active Storage proxy mode by sending large Range requests.","url":"https://insights.sbomify.com/CVE-2026-33174/"}