{"answers":{"affected":"4 open source packages ship an affected version, including actionpack. It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8166 exists.","fix":"Upgrade actionpack to a fixed version for your release line: 5.2.4.3 or 6.0.3.1.","what":"CVE-2020-8166 is a medium-severity vulnerability in Debian Debian Linux, published on 2 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2020-8166 and fix it if it is affected.\n\nWhat it is: CVE-2020-8166 is a medium-severity vulnerability in Debian Debian Linux, published on 2 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8166 exists.\n\nAffected packages and fixed versions:\n- actionpack (RubyGems): affected from 5.0.0; fixed in 5.2.4.3\n- actionpack (RubyGems): affected from 5.0.0; fixed in 5.2.4.3\n- actionpack (RubyGems): affected from 6.0.0; fixed in 6.0.3.1\n- actionpack (RubyGems): affected from 6.0.0; fixed in 6.0.3.1\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-2020-8166/ (Markdown: https://insights.sbomify.com/CVE-2020-8166/index.md)","id":"CVE-2020-8166","markdown":"https://insights.sbomify.com/CVE-2020-8166/index.md","name":"CVE-2020-8166","record":{"aliases":["DEBIAN-CVE-2020-8166","GHSA-jp5v-5gx4-jmj9","SUSE-SU-2024:0103-1","UBUNTU-CVE-2020-8166"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby on Rails","requires_auth":"none","summary":"Attackers can forge per-form CSRF tokens using a global token, bypassing CSRF protections in Ruby on Rails applications.","user_interaction":"required","vuln_class":"csrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"rails","vendor":"rubyonrails"}],"cvss":{"score":4.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-352","name":"Cross-Site Request Forgery"}],"description":"A CSRF forgery vulnerability exists in rails \u003c 5.2.5, rails \u003c 6.0.4 that makes it possible for an attacker to, given a global CSRF token such as the one present in the authenticity_token meta tag, forge a per-form CSRF token.","ecosystems":["RubyGems","SUSE:Linux Enterprise High Availability Extension 15 SP1","SUSE:Linux Enterprise High Availability Extension 15 SP2","SUSE:Linux Enterprise High Availability Extension 15 SP3","SUSE:Linux Enterprise High Availability Extension 15 SP4","SUSE:Linux Enterprise High Availability Extension 15 SP5","openSUSE:Leap 15.4","openSUSE:Leap 15.5"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Ability to forge per-form CSRF tokens in Rails","id":"CVE-2020-8166","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":"debian:debian_linux","products":["debian:debian_linux","rubyonrails:rails"],"type":"csrf","year":"2020"},"n_packages":11,"n_references":3,"next":{"headline":"CSRF Vulnerability in rails-ujs","id":"CVE-2020-8167"},"packages":[{"ecosystem":"RubyGems","fixed":["5.2.4.3"],"introduced":["5.0.0"],"last_affected":[],"package":"actionpack","purl":null,"source":"GHSA-jp5v-5gx4-jmj9"},{"ecosystem":"RubyGems","fixed":["5.2.4.3"],"introduced":["5.0.0"],"last_affected":[],"package":"actionpack","purl":"pkg:gem/actionpack","source":"GHSA-jp5v-5gx4-jmj9"},{"ecosystem":"RubyGems","fixed":["6.0.3.1"],"introduced":["6.0.0"],"last_affected":[],"package":"actionpack","purl":null,"source":"GHSA-jp5v-5gx4-jmj9"},{"ecosystem":"RubyGems","fixed":["6.0.3.1"],"introduced":["6.0.0"],"last_affected":[],"package":"actionpack","purl":"pkg:gem/actionpack","source":"GHSA-jp5v-5gx4-jmj9"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP1","fixed":["5.1.4-150000.3.29.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-actionpack-5_1","purl":"pkg:rpm/suse/rubygem-actionpack-5_1\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1","source":"SUSE-SU-2024:0103-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP2","fixed":["5.1.4-150000.3.29.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-actionpack-5_1","purl":"pkg:rpm/suse/rubygem-actionpack-5_1\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2","source":"SUSE-SU-2024:0103-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP3","fixed":["5.1.4-150000.3.29.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-actionpack-5_1","purl":"pkg:rpm/suse/rubygem-actionpack-5_1\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3","source":"SUSE-SU-2024:0103-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP4","fixed":["5.1.4-150000.3.29.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-actionpack-5_1","purl":"pkg:rpm/suse/rubygem-actionpack-5_1\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP4","source":"SUSE-SU-2024:0103-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP5","fixed":["5.1.4-150000.3.29.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-actionpack-5_1","purl":"pkg:rpm/suse/rubygem-actionpack-5_1\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP5","source":"SUSE-SU-2024:0103-1"},{"ecosystem":"openSUSE:Leap 15.4","fixed":["5.1.4-150000.3.29.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-actionpack-5_1","purl":"pkg:rpm/opensuse/rubygem-actionpack-5_1\u0026distro=openSUSE%20Leap%2015.4","source":"SUSE-SU-2024:0103-1"},{"ecosystem":"openSUSE:Leap 15.5","fixed":["5.1.4-150000.3.29.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-actionpack-5_1","purl":"pkg:rpm/opensuse/rubygem-actionpack-5_1\u0026distro=openSUSE%20Leap%2015.5","source":"SUSE-SU-2024:0103-1"}],"prev":{"headline":"ActiveSupport potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore","id":"CVE-2020-8165"},"products":["https://github.com/rails/rails"],"published":"2020-07-02","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-28","vendors":["n/a"]},"summary":"Attackers can forge per-form CSRF tokens using a global token, bypassing CSRF protections in Ruby on Rails applications.","url":"https://insights.sbomify.com/CVE-2020-8166/"}