{"cve":"CVE-2021-33198","nvd":{"published":"2021-08-02T19:15:08.527","modified":"2026-06-17T03:54:20.557","status":"Modified","description":"In Go before 1.15.13 and 1.16.x before 1.16.5, there can be a panic for a large exponent to the math/big.Rat SetString or UnmarshalText method.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":[],"references":["https://groups.google.com/g/golang-announce","https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI","https://security.gentoo.org/glsa/202208-02","https://groups.google.com/g/golang-announce","https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI"],"products":["golang:go"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-33198","score":0.03372,"percentile":0.8876,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GO-2021-0242","url":"https://osv.dev/vulnerability/GO-2021-0242","summary":"Panic on inputs with large exponents in math/big","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"stdlib","purl":"pkg:golang/stdlib","ranges":["<1.15.13",">=1.16.0-0 <1.16.5"],"fixed":["1.15.13","1.16.5"]}]}],"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."]}