CVE-2026-12143 - High Severity Vulnerability
Vulnerable Library - form-data-4.0.5.tgz
A library to create readable "multipart/form-data" streams. Can be used to submit forms and file uploads to other web applications.
Library home page: https://registry.npmjs.org/form-data/-/form-data-4.0.5.tgz
Path to dependency file: /ui/package.json
Path to vulnerable library: /ui/node_modules/.pnpm/form-data@4.0.5/node_modules/form-data/package.json
Dependency Hierarchy:
- @postgres.ai/ce-4.0.3.tgz (Root Library)
- cypress-14.5.4.tgz
- request-3.0.10.tgz
- ❌ form-data-4.0.5.tgz (Vulnerable Library)
Found in base branch: master
Vulnerability Details
form-data is a library for creating readable multipart/form-data streams. In versions through 4.0.5, the "field" argument to "FormData#append" and the "filename" option are concatenated verbatim into the "Content-Disposition" header without escaping carriage return (CR), line feed (LF), or double-quote (") characters. An application that passes attacker-controlled data as a field name or filename (for example, an API gateway that turns JSON object keys into multipart field names) allows the attacker to terminate the header line and inject additional headers, or to smuggle entire additional multipart parts, into the request the application forwards to a backend. This can let the attacker add or override form fields (e.g. set "is_admin=true") seen by the downstream parser. This is an instance of CWE-93 (CRLF injection). The fix escapes CR, LF, and """ as "%0D", "%0A", and "%22" in field names and filenames, matching the serialization browsers use per the WHATWG HTML multipart/form-data encoding algorithm. Exploitation requires the consuming application to use untrusted input as a field name or filename; applications that use only fixed/trusted field names are not affected. Fixed in 2.5.6, 3.0.5, and 4.0.6.
Publish Date: 2026-06-12
URL: CVE-2026-12143
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: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: https://github.com/form-data/form-data/security/advisories/GHSA-fjwh-7mfq-fhwh
Release Date: 2026-06-12
Fix Resolution: form-data - 3.0.5,form-data - 2.5.6,form-data - 4.0.6
Step up your Open Source Security Game with Mend here
CVE-2026-12143 - High Severity Vulnerability
A library to create readable "multipart/form-data" streams. Can be used to submit forms and file uploads to other web applications.
Library home page: https://registry.npmjs.org/form-data/-/form-data-4.0.5.tgz
Path to dependency file: /ui/package.json
Path to vulnerable library: /ui/node_modules/.pnpm/form-data@4.0.5/node_modules/form-data/package.json
Dependency Hierarchy:
Found in base branch: master
form-data is a library for creating readable multipart/form-data streams. In versions through 4.0.5, the "field" argument to "FormData#append" and the "filename" option are concatenated verbatim into the "Content-Disposition" header without escaping carriage return (CR), line feed (LF), or double-quote (") characters. An application that passes attacker-controlled data as a field name or filename (for example, an API gateway that turns JSON object keys into multipart field names) allows the attacker to terminate the header line and inject additional headers, or to smuggle entire additional multipart parts, into the request the application forwards to a backend. This can let the attacker add or override form fields (e.g. set "is_admin=true") seen by the downstream parser. This is an instance of CWE-93 (CRLF injection). The fix escapes CR, LF, and """ as "%0D", "%0A", and "%22" in field names and filenames, matching the serialization browsers use per the WHATWG HTML multipart/form-data encoding algorithm. Exploitation requires the consuming application to use untrusted input as a field name or filename; applications that use only fixed/trusted field names are not affected. Fixed in 2.5.6, 3.0.5, and 4.0.6.
Publish Date: 2026-06-12
URL: CVE-2026-12143
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: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://github.com/form-data/form-data/security/advisories/GHSA-fjwh-7mfq-fhwh
Release Date: 2026-06-12
Fix Resolution: form-data - 3.0.5,form-data - 2.5.6,form-data - 4.0.6
Step up your Open Source Security Game with Mend here