{"cve":"CVE-2024-47889","nvd":{"published":"2024-10-16T21:15:13.320","modified":"2026-06-17T07:57:55.660","status":"Deferred","description":"Action Mailer is a framework for designing email service layers. Starting in version 3.0.0 and prior to versions 6.1.7.9, 7.0.8.5, 7.1.4.1, and 7.2.1.1, there is a possible ReDoS vulnerability in the block_format helper in Action Mailer. Carefully crafted text can cause the block_format helper to take an unexpected amount of time, possibly resulting in a DoS vulnerability. All users running an affected release should either upgrade to versions 6.1.7.9, 7.0.8.5, 7.1.4.1, or 7.2.1.1 or apply the relevant patch immediately. As a workaround, users can avoid calling the `block_format` helper or upgrade to Ruby 3.2. Ruby 3.2 has mitigations for this problem, so Rails applications using Ruby 3.2 or newer are unaffected. Rails 8.0.0.beta1 requires Ruby 3.2 or greater so is unaffected.","cvss_v4":{"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","score":6.6},"cvss_v3":null,"cwes":["CWE-1333"],"references":["https://github.com/rails/rails/commit/0e5694f4d32544532d2301a9b4084eacb6986e94","https://github.com/rails/rails/commit/3612e3eb3fbafed4f85e1c6ea4c7b6addbb0fdd3","https://github.com/rails/rails/commit/985f1923fa62806ff676e41de67c3b4552131ab9","https://github.com/rails/rails/commit/be898cc996986decfe238341d96b2a6573b8fd2e","https://github.com/rails/rails/security/advisories/GHSA-h47h-mwp9-c6q6"],"products":[],"source":"nvd","synced_at":"2026-10-19T21:55:31.737901711+00:00"},"epss":{"cve":"CVE-2024-47889","score":0.00937,"percentile":0.60869,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-h47h-mwp9-c6q6","url":"https://osv.dev/vulnerability/GHSA-h47h-mwp9-c6q6","summary":"Possible ReDoS vulnerability in block_format in Action Mailer","modified":"2025-01-07T21:52:28.561887Z","packages":[{"ecosystem":"RubyGems","name":"actionmailer","purl":"pkg:gem/actionmailer","ranges":[">=3.0.0 <6.1.7.9"],"fixed":["6.1.7.9"]},{"ecosystem":"RubyGems","name":"actionmailer","purl":"pkg:gem/actionmailer","ranges":[">=7.0.0 <7.0.8.5"],"fixed":["7.0.8.5"]},{"ecosystem":"RubyGems","name":"actionmailer","purl":"pkg:gem/actionmailer","ranges":[">=7.1.0 <7.1.4.1"],"fixed":["7.1.4.1"]},{"ecosystem":"RubyGems","name":"actionmailer","purl":"pkg:gem/actionmailer","ranges":[">=7.2.0 <7.2.1.1"],"fixed":["7.2.1.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}