{"answers":{"affected":"6 open source packages ship an affected version, including activesupport. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33169 in the wild and no public exploit code.","fix":"Upgrade activesupport to a fixed version for your release line: 7.2.3.1, 8.0.4.1 or 8.1.2.1.","what":"CVE-2026-33169 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-2026-33169 and fix it if it is affected.\n\nWhat it is: CVE-2026-33169 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-2026-33169 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- activesupport (RubyGems): affected all versions; fixed in 7.2.3.1\n- activesupport (RubyGems): affected all versions; fixed in 7.2.3.1\n- activesupport (RubyGems): affected from 8.0.0.beta1; fixed in 8.0.4.1\n- activesupport (RubyGems): affected from 8.0.0.beta1; fixed in 8.0.4.1\n- activesupport (RubyGems): affected from 8.1.0.beta1; fixed in 8.1.2.1\n- activesupport (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-2026-33169/ (Markdown: https://insights.sbomify.com/CVE-2026-33169/index.md)","id":"CVE-2026-33169","markdown":"https://insights.sbomify.com/CVE-2026-33169/index.md","name":"CVE-2026-33169","record":{"aliases":["DEBIAN-CVE-2026-33169","GHSA-cg4j-q9v8-6v38","MINI-362p-6cfj-j3mc","MINI-j39f-8jc6-5584","MINI-m8fj-m3qc-xfhm","UBUNTU-CVE-2026-33169"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby on Rails library","requires_auth":"none","summary":"Attackers can cause denial of service via quadratic time complexity in number_to_delimited when processing long digit strings.","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":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"},{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. `NumberToDelimitedConverter` uses a lookahead-based regular expression with `gsub!` to insert thousands delimiters. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, the interaction between the repeated lookahead group and `gsub!` can produce quadratic time complexity on long digit strings. 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 Support has a possible ReDoS vulnerability in number_to_delimited","id":"CVE-2026-33169","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":"Rails Active Support has a possible XSS vulnerability in SafeBuffer#%","id":"CVE-2026-33170"},"packages":[{"ecosystem":"RubyGems","fixed":["7.2.3.1"],"introduced":["0"],"last_affected":[],"package":"activesupport","purl":null,"source":"GHSA-cg4j-q9v8-6v38"},{"ecosystem":"RubyGems","fixed":["7.2.3.1"],"introduced":["0"],"last_affected":[],"package":"activesupport","purl":"pkg:gem/activesupport","source":"GHSA-cg4j-q9v8-6v38"},{"ecosystem":"RubyGems","fixed":["8.0.4.1"],"introduced":["8.0.0.beta1"],"last_affected":[],"package":"activesupport","purl":null,"source":"GHSA-cg4j-q9v8-6v38"},{"ecosystem":"RubyGems","fixed":["8.0.4.1"],"introduced":["8.0.0.beta1"],"last_affected":[],"package":"activesupport","purl":"pkg:gem/activesupport","source":"GHSA-cg4j-q9v8-6v38"},{"ecosystem":"RubyGems","fixed":["8.1.2.1"],"introduced":["8.1.0.beta1"],"last_affected":[],"package":"activesupport","purl":null,"source":"GHSA-cg4j-q9v8-6v38"},{"ecosystem":"RubyGems","fixed":["8.1.2.1"],"introduced":["8.1.0.beta1"],"last_affected":[],"package":"activesupport","purl":"pkg:gem/activesupport","source":"GHSA-cg4j-q9v8-6v38"}],"prev":{"headline":"Rails has a possible XSS vulnerability in its Action View tag helpers","id":"CVE-2026-33168"},"products":["activesupport"],"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 denial of service via quadratic time complexity in number_to_delimited when processing long digit strings.","url":"https://insights.sbomify.com/CVE-2026-33169/"}