CVE-2026-27942
1 advisory.
npm/fast-xml-parser CVE-2026-27942: low, EPSS 0.73%
fast-xml-parser has stack overflow in XMLBuilder with preserveOrder
Action: Upgrade fast-xml-parser to 4.5.4 or later.
npm i fast-xml-parser@5.3.8npm i fast-xml-parser@4.5.4Affected
| introduced | fixed | last affected |
|---|---|---|
| 5.0.0 | 5.3.8 | - |
| 4.0.0-beta.0 | 4.5.4 | - |
Fixed versions
| 5.3.8 | 4.5.4 |
Sources
- osv: 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
CVE-2026-27942 · published · modified · JSON