CVE-2026-8161 - High Severity Vulnerability
Vulnerable Library - multiparty-3.3.2.tgz
multipart/form-data parser which supports streaming
Library home page: https://registry.npmjs.org/multiparty/-/multiparty-3.3.2.tgz
Path to dependency file: /OPENAPI-REST-API/openapi-documentation/dynamic-html/package.json
Path to vulnerable library: /OPENAPI-REST-API/openapi-documentation/dynamic-html/node_modules/multiparty/package.json,/OPENAPI-REST-API/swagger-client/dynamic-html/node_modules/multiparty/package.json,/OPENAPI-REST-API/swagger-documentation/dynamic-html/node_modules/multiparty/package.json
Dependency Hierarchy:
- express-3.21.2.tgz (Root Library)
- connect-2.30.2.tgz
- ❌ multiparty-3.3.2.tgz (Vulnerable Library)
Found in HEAD commit: 1f70e2feccb7006c8d32cc7d4fe62f5cf5e5c34d
Found in base branch: master
Vulnerability Details
multiparty@4.2.3 and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a field name that collides with an inherited Object.prototype property such as proto, constructor, or toString, the parser invokes .push() on the inherited prototype value rather than an array, throwing a TypeError that propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to multiparty@4.3.0 or higher.
Mend Note: The description of this vulnerability differs from MITRE.
Publish Date: 2026-05-12
URL: CVE-2026-8161
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-05-12
Fix Resolution (multiparty): 4.3.0
Direct dependency fix Resolution (express): 4.0.0
Step up your Open Source Security Game with Mend here
CVE-2026-8161 - High Severity Vulnerability
multipart/form-data parser which supports streaming
Library home page: https://registry.npmjs.org/multiparty/-/multiparty-3.3.2.tgz
Path to dependency file: /OPENAPI-REST-API/openapi-documentation/dynamic-html/package.json
Path to vulnerable library: /OPENAPI-REST-API/openapi-documentation/dynamic-html/node_modules/multiparty/package.json,/OPENAPI-REST-API/swagger-client/dynamic-html/node_modules/multiparty/package.json,/OPENAPI-REST-API/swagger-documentation/dynamic-html/node_modules/multiparty/package.json
Dependency Hierarchy:
Found in HEAD commit: 1f70e2feccb7006c8d32cc7d4fe62f5cf5e5c34d
Found in base branch: master
multiparty@4.2.3 and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a field name that collides with an inherited Object.prototype property such as proto, constructor, or toString, the parser invokes .push() on the inherited prototype value rather than an array, throwing a TypeError that propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to multiparty@4.3.0 or higher.
Mend Note: The description of this vulnerability differs from MITRE.
Publish Date: 2026-05-12
URL: CVE-2026-8161
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Type: Upgrade version
Release Date: 2026-05-12
Fix Resolution (multiparty): 4.3.0
Direct dependency fix Resolution (express): 4.0.0
Step up your Open Source Security Game with Mend here