{"schema_version":"1.7.3","id":"GHSA-378v-28hj-76wf","published":"2026-02-20T06:30:39Z","modified":"2026-02-25T13:44:03.167273Z","aliases":["CVE-2026-2739"],"related":["CGA-j9mh-7wr6-2qqr"],"summary":"bn.js affected by an infinite loop","details":"This affects versions of the package bn.js before 4.12.3 and 5.2.3. Calling maskn(0) on any BN instance corrupts the internal state, causing toString(), divmod(), and other methods to enter an infinite loop, hanging the process indefinitely.","affected":[{"package":{"name":"bn.js","ecosystem":"npm","purl":"pkg:npm/bn.js"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.12.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-378v-28hj-76wf/GHSA-378v-28hj-76wf.json"}},{"package":{"name":"bn.js","ecosystem":"npm","purl":"pkg:npm/bn.js"},"ranges":[{"type":"SEMVER","events":[{"introduced":"5.0.0"},{"fixed":"5.2.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-378v-28hj-76wf/GHSA-378v-28hj-76wf.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2739"},{"type":"WEB","url":"https://github.com/indutny/bn.js/issues/186"},{"type":"WEB","url":"https://github.com/indutny/bn.js/issues/316"},{"type":"WEB","url":"https://github.com/indutny/bn.js/issues/316#issuecomment-3924217358"},{"type":"WEB","url":"https://github.com/indutny/bn.js/pull/317"},{"type":"WEB","url":"https://github.com/indutny/bn.js/commit/33df26b5771e824f303a79ec6407409376baa64b"},{"type":"WEB","url":"https://gist.github.com/Kr0emer/02370d18328c28b5dd7f9ac880d22a91"},{"type":"PACKAGE","url":"https://github.com/indutny/bn.js"},{"type":"WEB","url":"https://github.com/indutny/bn.js/releases/tag/v5.2.3"},{"type":"WEB","url":"https://security.snyk.io/vuln/SNYK-JS-BNJS-15274301"}],"database_specific":{"cwe_ids":["CWE-835"],"github_reviewed":true,"github_reviewed_at":"2026-02-20T21:18:31Z","nvd_published_at":"2026-02-20T05:17:53Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"}]}