{"id":"CVE-2026-33176","summary":"Rails Active Support has a possible DoS vulnerability in its number helpers","details":"Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Support number helpers accept strings containing scientific notation (e.g. `1e10000`), which `BigDecimal` expands into extremely large decimal representations. This can cause excessive memory allocation and CPU consumption when the expanded number is formatted, possibly resulting in a DoS vulnerability. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.","aliases":["GHSA-2j26-frm8-cmj9"],"modified":"2026-04-02T13:27:26.410586Z","published":"2026-03-23T23:29:27.933Z","related":["CGA-6p82-p5j2-744w"],"database_specific":{"cwe_ids":["CWE-400","CWE-770"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33176.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33176.json"},{"type":"FIX","url":"https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb"},{"type":"FIX","url":"https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a"},{"type":"FIX","url":"https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856"},{"type":"WEB","url":"https://github.com/rails/rails/releases/tag/v7.2.3.1"},{"type":"WEB","url":"https://github.com/rails/rails/releases/tag/v8.0.4.1"},{"type":"WEB","url":"https://github.com/rails/rails/releases/tag/v8.1.2.1"},{"type":"ADVISORY","url":"https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33176"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rails/rails","events":[{"introduced":"80827ca7ff33ca3026f2c74fe8249ccc6f513318"},{"fixed":"1db4b89687cc18311fc3f92623136705df24e671"}],"database_specific":{"versions":[{"introduced":"8.1.0.beta1"},{"fixed":"8.1.2.1"}]}},{"type":"GIT","repo":"https://github.com/rails/rails","events":[{"introduced":"72bc36fb47aa3a9b10149ecefc1f344d7b028d79"},{"fixed":"a79efed95797b196575a98845dc989e3106a9acb"}],"database_specific":{"versions":[{"introduced":"8.0.0.beta1"},{"fixed":"8.0.4.1"}]}},{"type":"GIT","repo":"https://github.com/rails/rails","events":[{"introduced":"0"},{"fixed":"ba76fca032a66f3716ca8a661c9ddb006acaf885"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"7.2.3.1"}]}}],"versions":["v0.10.0","v0.10.1","v0.11.0","v0.11.1","v0.12.0","v0.13.0","v0.13.1","v0.14.1","v0.14.2","v0.14.3","v0.14.4","v0.9.1","v0.9.2","v0.9.3","v0.9.4","v0.9.4.1","v0.9.5","v1.0.0","v1.1.0","v1.1.0_RC1","v1.1.1","v1.1.2","v1.1.3","v1.1.4","v1.1.5","v1.1.6","v1.2.0","v1.2.0_RC1","v1.2.0_RC2","v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.2.5","v1.2.6","v2.0.0","v2.0.0_PR","v2.0.0_RC1","v2.0.0_RC2","v2.0.1","v2.0.2","v2.0.3","v2.0.4","v2.0.5","v2.1.0","v2.1.0_RC1","v2.1.1","v2.1.2","v2.2.0","v2.2.1","v2.2.2","v2.2.3","v2.3.0","v2.3.1","v2.3.10","v2.3.11","v2.3.12","v2.3.13","v2.3.14","v2.3.15","v2.3.16","v2.3.17","v2.3.18","v2.3.2","v2.3.2.1","v2.3.3","v2.3.3.1","v2.3.4","v2.3.5","v2.3.6","v2.3.7","v2.3.8","v2.3.9","v2.3.9.pre","v3.0.0","v3.0.0.beta.2","v3.0.0.beta.3","v3.0.0.beta1","v3.0.0.beta2","v3.0.0.beta3","v3.0.0.beta4","v3.0.0_RC","v3.0.0_RC2","v3.0.1","v3.0.10","v3.0.10.rc1","v3.0.11","v3.0.12","v3.0.12.rc1","v3.0.13","v3.0.13.rc1","v3.0.14","v3.0.15","v3.0.16","v3.0.17","v3.0.18","v3.0.19","v3.0.2","v3.0.20","v3.0.3","v3.0.4","v3.0.4.rc1","v3.0.5","v3.0.5.rc1","v3.0.6","v3.0.6.rc1","v3.0.6.rc2","v3.0.7","v3.0.7.rc1","v3.0.7.rc2","v3.0.8","v3.0.8.rc1","v3.0.8.rc2","v3.0.8.rc3","v3.0.8.rc4","v3.0.9","v3.0.9.rc1","v3.0.9.rc2","v3.0.9.rc3","v3.0.9.rc4","v3.0.9.rc5","v3.1.0","v3.1.0.beta1","v3.1.0.rc1","v3.1.0.rc2","v3.1.0.rc3","v3.1.0.rc4","v3.1.0.rc5","v3.1.0.rc6","v3.1.0.rc7","v3.1.0.rc8","v3.1.1","v3.1.1.rc1","v3.1.1.rc2","v3.1.1.rc3","v3.1.10","v3.1.11","v3.1.12","v3.1.2","v3.1.2.rc1","v3.1.2.rc2","v3.1.3","v3.1.4","v3.1.4.rc1","v3.1.5","v3.1.5.rc1","v3.1.6","v3.1.7","v3.1.8","v3.1.9","v3.2.0","v3.2.0.rc1","v3.2.0.rc2","v3.2.1","v3.2.10","v3.2.11","v3.2.12","v3.2.13","v3.2.13.rc1","v3.2.13.rc2","v3.2.14","v3.2.14.rc1","v3.2.14.rc2","v3.2.15","v3.2.15.rc1","v3.2.15.rc2","v3.2.15.rc3","v3.2.16","v3.2.17","v3.2.18","v3.2.19","v3.2.2","v3.2.2.rc1","v3.2.20","v3.2.21","v3.2.22","v3.2.22.1","v3.2.22.2","v3.2.22.3","v3.2.22.4","v3.2.22.5","v3.2.3","v3.2.3.rc1","v3.2.3.rc2","v3.2.4","v3.2.4.rc1","v3.2.5","v3.2.6","v3.2.7","v3.2.7.rc1","v3.2.8","v3.2.8.rc1","v3.2.8.rc2","v3.2.9","v3.2.9.rc1","v3.2.9.rc2","v3.2.9.rc3","v4.0.0","v4.0.0.beta1","v4.0.0.rc1","v4.0.0.rc2","v4.0.1","v4.0.1.rc1","v4.0.1.rc2","v4.0.1.rc3","v4.0.1.rc4","v4.0.10","v4.0.10.rc1","v4.0.10.rc2","v4.0.11","v4.0.11.1","v4.0.12","v4.0.13","v4.0.13.rc1","v4.0.2","v4.0.3","v4.0.4","v4.0.4.rc1","v4.0.5","v4.0.6","v4.0.6.rc1","v4.0.6.rc2","v4.0.6.rc3","v4.0.7","v4.0.8","v4.0.9","v4.1.0","v4.1.0.beta1","v4.1.0.beta2","v4.1.0.rc1","v4.1.0.rc2","v4.1.1","v4.1.10","v4.1.10.rc1","v4.1.10.rc2","v4.1.10.rc3","v4.1.10.rc4","v4.1.11","v4.1.12","v4.1.12.rc1","v4.1.13","v4.1.13.rc1","v4.1.14","v4.1.14.1","v4.1.14.2","v4.1.14.rc1","v4.1.14.rc2","v4.1.15","v4.1.15.rc1","v4.1.16","v4.1.16.rc1","v4.1.2","v4.1.2.rc1","v4.1.2.rc2","v4.1.2.rc3","v4.1.3","v4.1.4","v4.1.5","v4.1.6","v4.1.6.rc1","v4.1.6.rc2","v4.1.7","v4.1.7.1","v4.1.8","v4.1.9","v4.1.9.rc1","v4.2.0","v4.2.0.beta1","v4.2.0.beta2","v4.2.0.beta3","v4.2.0.beta4","v4.2.0.rc1","v4.2.0.rc2","v4.2.0.rc3","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