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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-12143)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-12143)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
443190	SCA: security update for form-data (GHSA-hmw2-7cc7-3qxx)	Tenable Cloud Security	SCA Checks	high
443190	SCA: security update for form-data (GHSA-hmw2-7cc7-3qxx)	Tenable Self-Hosted Container Security	SCA Checks	high
320982	Linux Distros Unpatched Vulnerability : CVE-2026-12143	Nessus	Misc.	high

Detections

Analytics

CVE-2026-12143

high

Tenable Plugins

high

high

high