CVE-2026-33349
1 advisory.
npm/fast-xml-parser CVE-2026-33349: medium 5.9
Entity Expansion Limits Bypassed When Set to Zero Due to JavaScript Falsy Evaluation in fast-xml-parser
Action: Upgrade fast-xml-parser to 4.5.5 or later.
npm i fast-xml-parser@4.5.5npm i fast-xml-parser@5.5.7Affected
| introduced | fixed | last affected |
|---|---|---|
| 4.0.0-beta.3 | 4.5.5 | - |
| 5.0.0 | 5.5.7 | - |
Fixed versions
| 4.5.5 | 5.5.7 |
Sources
- osv: GHSA-jp2q-39xq-3w4g
- https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-jp2q-39xq-3w4g
- https://nvd.nist.gov/vuln/detail/CVE-2026-33349
- https://github.com/NaturalIntelligence/fast-xml-parser/commit/239b64aa1fc5c5455ddebbbb54a187eb68c9fdb7
- https://github.com/NaturalIntelligence/fast-xml-parser/commit/88d0936a23dabe51bfbf42255e2ce912dfee2221
- https://github.com/NaturalIntelligence/fast-xml-parser
CVE-2026-33349 · published · modified · JSON