{"action":"Upgrade fast-xml-parser to 4.5.4 or later.","affected":[{"fixed":"5.3.8","introduced":"5.0.0"},{"fixed":"4.5.4","introduced":"4.0.0-beta.0"}],"component":"fast-xml-parser","cve_ids":["CVE-2026-27942"],"ecosystem":"npm","epss":0.00543,"exploited":false,"fixed_versions":["5.3.8","4.5.4"],"ghsa_id":"GHSA-fj3w-jwp8-x2g3","id":"tcs_01M5KFNMSSNDB8BE1YHBCYJD0N","modified_at":"2026-09-10T03:50:34.765253793Z","published_at":"2026-02-26T22:33:10Z","references":["https://osv.dev/vulnerability/GHSA-fj3w-jwp8-x2g3","https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-fj3w-jwp8-x2g3","https://nvd.nist.gov/vuln/detail/CVE-2026-27942","https://github.com/NaturalIntelligence/fast-xml-parser/pull/791","https://github.com/NaturalIntelligence/fast-xml-parser/commit/c13a961910f14986295dd28484eee830fa1a0e8a","https://github.com/NaturalIntelligence/fast-xml-parser"],"severity":{"label":"low"},"sources":[{"source":"osv","source_id":"GHSA-fj3w-jwp8-x2g3","url":"https://osv.dev/vulnerability/GHSA-fj3w-jwp8-x2g3"}],"summary":"fast-xml-parser has stack overflow in XMLBuilder with preserveOrder"}