{"id":"CVE-2026-32686","summary":"Unbounded exponent in decimal enables unauthenticated DoS","details":"Uncontrolled Resource Consumption vulnerability in ericmj decimal allows unauthenticated remote Denial of Service.\n\nThe decimal library does not bound the exponent on parsed input. Storing a decimal with a very large exponent (e.g. Decimal.new(\"1e1000000000\")) is accepted without error. Subsequent calls to arithmetic functions (Decimal.add/2, Decimal.sub/2, Decimal.div/2), Decimal.to_string/2 with :normal or :xsd format, Decimal.to_integer/1, Decimal.round/3, or Decimal.compare/3 with a threshold allocate memory proportional to the exponent value, which can exhaust available memory and crash the BEAM VM.\n\nAny application that accepts user-supplied decimal input and subsequently performs arithmetic, rounding, conversion to integer, or string formatting on it is exposed. A single malicious request is sufficient to cause an out-of-memory crash.\n\nThis issue affects decimal: from 0.1.0 before 3.0.0.","aliases":["EEF-CVE-2026-32686","GHSA-rhv4-8758-jx7v"],"modified":"2026-07-08T08:12:47.123729575Z","published":"2026-05-07T14:04:47.222Z","database_specific":{"cna_assigner":"EEF","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"bc11f4a2b6fb61fc1360a0ab4e79141bba918841"},{"fixed":"6a523f3a73b8c9974540e21c7aa88f1258bb35ae"}]}],"cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32686.json"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-32686.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-32686"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32686.json"},{"type":"ADVISORY","url":"https://github.com/ericmj/decimal/security/advisories/GHSA-rhv4-8758-jx7v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32686"},{"type":"FIX","url":"https://github.com/ericmj/decimal/commit/6a523f3a73b8c9974540e21c7aa88f1258bb35ae"},{"type":"PACKAGE","url":"https://github.com/ericmj/decimal"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ericmj/decimal","events":[{"introduced":"5c03fbef986adf27846c4725e04e40220ebc17b4"},{"fixed":"58d91e922f88d3365dbf919d33eafdf51a8dfc22"},{"fixed":"6a523f3a73b8c9974540e21c7aa88f1258bb35ae"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0.1.0"},{"fixed":"3.0.0"}]}}],"versions":["v2.4.0","v2.3.0","v2.2.0","v2.1.1","v2.1.0","v2.0.0","v1.9.0-rc.0","v2.0.0-rc.0","v1.8.1","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.1","v1.4.0","v1.3.1","v1.3.0","v1.2.0","v1.1.2","v1.1.1","v1.1.0","v1.0.1","v1.0.0","v0.2.5","v0.2.4","v0.2.3","v0.2.2","v0.2.1","v0.2.0","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32686.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}