Home/CVE/fast-xml-parser before 4.1.2 allows __proto__ for Prototype Pollution.
CVE

CVE-2023-26920

fast-xml-parser before 4.1.2 allows __proto__ for Prototype Pollution.

fast-xml-parser before 4.1.2 allows __proto__ for Prototype Pollution.

MEDIUM · CVSS 6.5 EPSS 0.00199
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
▤

Affected Products & Versions

1
naturalintelligence fast xml parser< 4.1.2
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven org.apache.druid:druid-core MODERATE fixed in 0.21.0
npm fast-xml-parser MODERATE fixed in 4.1.2
⚠

Public Exploits & PoCs

1
pocgist.github.com · a5a45bd0804d522a1392cb5023aa7ef7gist.github.com
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Dec 2023 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/NaturalIntelligence/fast-xml-parser/commit/2b032a4f799c63d83991e4f992f1c68e4dd05804Patch
https://github.com/advisories/GHSA-793h-6f7r-6qvmThird Party Advisory
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