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.

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21448-1 advisory.

    - CVE-2025-7783: form-data: unsafe `Math.random()` function is used to select a boundary value for     multipart       form-encoded data (bsc#1246822).
    - CVE-2026-12143: form-data: CRLF injection via unescaped multipart field names and filenames     (bsc#1272310).
    - CVE-2026-13149: brace-expansion: `expand()` function exhibits exponential-time complexity when     processing       non-expanding `{}` brace groups (bsc#1269927).
    - CVE-2026-13311: shell-quote: quadratic complexity in `parse()` function when processing specially     crafted strings       (bsc#1269359).
    - CVE-2026-13676: fast-uri: host-based policy bypass due to failure to canonicalize Unicode/IDN hostnames     for       HTTP-family URLs (bsc#1269595).
    - CVE-2026-27601: underscore: DoS via stack overflow due to missing depth limits in `_.flatten` and     `_.isEqual`       functions (bsc#1259169).
    - CVE-2026-40181: react-router: open redirect to an external domain due to path values starting with `//`     being       reinterpreted as protocol-relative URLs (bsc#1272311).
    - CVE-2026-49356: @babel/core: arbitrary file read via `sourceMappingURL` comment (bsc#1272317).
    - CVE-2026-53550: js-yaml: quadratic complexity in merge-key processing when processing a crafted YAML     document       (bsc#1268851).
    - CVE-2026-53632: launch-editor: NTLMv2 hash disclosure via UNC path handling on Windows (bsc#1272319).
    - CVE-2026-54466: websocket-driver: message corruption via abuse of protocol length headers (bsc#1272312).
    - CVE-2026-54490: websocket-driver: resource limit bypass via message compression (bsc#1272313).
    - CVE-2026-55602: http-proxy-middleware: Host-header-driven backend routing bypass via `router` host+path     substring       matching (bsc#1272318).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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	Type	Severity
330583	openSUSE 16 Security Update : agama-web-ui (openSUSE-SU-2026:21448-1)	Nessus	SuSE Local Security Checks	Local	critical
443190	SCA: security update for form-data (GHSA-hmw2-7cc7-3qxx)	Tenable Cloud Security	SCA Checks	Local	high
443190	SCA: security update for form-data (GHSA-hmw2-7cc7-3qxx)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
320982	Linux Distros Unpatched Vulnerability : CVE-2026-12143	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-12143

high

Tenable Plugins

critical

high

high

high