CVE-2026-74866

@fastify/busboy is a multipart form-data parser for Node.js. Its multipart part-header parser splits header lines only on the two-byte carriage-return line-feed sequence, so a lone carriage return or line feed embedded in a part header is not treated as a line break and is carried verbatim into t...

CVE-2026-74866

@fastify/busboy is a multipart form-data parser for Node.js. Its multipart part-header parser splits header lines only on the two-byte carriage-return line-feed sequence, so a lone carriage return or line feed embedded in a part header is not treated as a line break and is carried verbatim into t...

CVE-2026-74866 @fastify/busboy vulnerable to CRLF injection via multipart Content-Disposition filename and name

@fastify/busboy is a multipart form-data parser for Node.js. Its multipart part-header parser splits header lines only on the two-byte carriage-return line-feed sequence, so a lone carriage return or line feed embedded in a part header is not treated as a line break and is carried verbatim into t...

CVE-2026-74866 @fastify/busboy vulnerable to CRLF injection via multipart Content-Disposition filename and name

@fastify/busboy is a multipart form-data parser for Node.js. Its multipart part-header parser splits header lines only on the two-byte carriage-return line-feed sequence, so a lone carriage return or line feed embedded in a part header is not treated as a line break and is carried verbatim into t...

0xble (>=22.0.0, <=23.2.2), 0xsodium (>=0.2.0, <=0.14.0) +14135 more potentially affected by CVE-2026-74866 via @fastify/busboy (>=1.0.0, <=3.2.1)

@fastify/busboy NPM version =1.0.0, =22.0.0, =0.2.0, =0.0.1, =1.0.0, =0.2.0, =0.4.0, =0.1.0, =0.0.1, =1.0.21, =0.6.0, =0.6.2 and more Source cves: CVE-2026-74866 Source advisory: MEND:CVE-2026-74866...

CVE-2026-74866 @fastify/busboy vulnerable to CRLF injection via multipart Content-Disposition filename and name

@fastify/busboy is a multipart form-data parser for Node.js. Its multipart part-header parser splits header lines only on the two-byte carriage-return line-feed sequence, so a lone carriage return or line feed embedded in a part header is not treated as a line break and is carried verbatim into t...

CVE-2026-74866: Improper Neutralization of CRLF Sequences

@fastify/busboy is a multipart form-data parser for Node.js. Its multipart part-header parser splits header lines only on the two-byte carriage-return line-feed sequence, so a lone carriage return or line feed embedded in a part header is not treated as a line break and is carried verbatim into t...

PT-2026-79314

Name of the Vulnerable Software and Affected Versions @fastify/busboy versions prior to 3.2.2 Description This multipart form-data parser for Node.js fails to correctly handle lone carriage return or line feed characters in part headers, as it only splits lines on the two-byte carriage-return...

Reliance on Untrusted Inputs in a Security Decision

Overview fastify is an overhead web framework, for Node.js. Affected versions of this package are vulnerable to Reliance on Untrusted Inputs in a Security Decision through the getTrustProxyFn hop-count handling in lib/request.js when trustProxy is configured as a number. An attacker can overwrite...

@agent-tool-platform/agent-kit (>=0.2.0, <=0.4.0), @agent-tool-platform/ast-summarizer (>=0.1.0, <=0.1.1) +315 more potentially affected by CVE-2026-16732 via fastify (>=5.8.3, <=5.12.0)

fastify NPM version =5.8.3, =0.2.0, =0.1.0, =0.1.0, =0.1.0, =0.0.0-vBETA-20260417080530, =0.0.1, =1.0.0, =0.0.0, =1.1.4, =4.0.0, =1.0.0-rc.2, =0.6.7, =0.6.7, =0.6.8 and more Source cves: CVE-2026-16732 Source advisory: SNYK:JS-FASTIFY-18965771...

@agent-tool-platform/agent-kit (>=0.2.0, <=0.4.0), @agent-tool-platform/ast-summarizer (>=0.1.0, <=0.1.1) +512 more potentially affected by CVE-2026-18504 via fastify (>=5.0.0-alpha.2, <=5.12.0)

fastify NPM version =5.0.0-alpha.2, =0.2.0, =0.1.0, =0.1.0, =0.1.0, =0.0.0-vBETA-20260417080530, =0.0.1, =1.60.2, =1.0.0, =0.0.0, =2.0.1, =1.1.1, =1.1.4, =1.2.0 and more Source cves: CVE-2026-18504 Source advisory: SNYK:JS-FASTIFY-18965901...

Improper Validation of Specified Type of Input

Overview fastify is an overhead web framework, for Node.js. Affected versions of this package are vulnerable to Improper Validation of Specified Type of Input via the request validation path in lib/validation.js. An attacker can bypass body schema type enforcement by sending a root-level primitiv...

CVE-2026-16732

fastify is a fast and low overhead web framework for Node.js. Impact: the fix for CVE-2026-3635 added a guard on the forwarded-header reads used to derive the request host, protocol, hostname, ip, and ips values, checking the connecting address. That guard closes the IP, CIDR, and custom-function...

CVE-2026-18504

fastify is a fast and low overhead web framework for Node.js. Versions of fastify before 5.12.1 are affected by a schema validation bypass when a request body schema targets a root primitive value. When the schema validates a top-level primitive such as an integer, Ajv can coerce a JSON string in...

CVE-2026-16732 fastify vulnerable to X-Forwarded-* spoofing under trustProxy hop-count

fastify is a fast and low overhead web framework for Node.js. Impact: the fix for CVE-2026-3635 added a guard on the forwarded-header reads used to derive the request host, protocol, hostname, ip, and ips values, checking the connecting address. That guard closes the IP, CIDR, and custom-function...

CVE-2026-16732

Fastify 5.8.3–5.12.0 remains vulnerable to X-Forwarded-* spoofing when trustProxy is set numerically (e.g., 1), because the CVE-2026-3635 guard predicate ignores the connecting address. This enables host injection, HTTPS-enforcement bypass, secure-cookie/CSRF-origin bypass, and cache poisoning. P...

CVE-2026-16732 fastify vulnerable to X-Forwarded-* spoofing under trustProxy hop-count

fastify is a fast and low overhead web framework for Node.js. Impact: the fix for CVE-2026-3635 added a guard on the forwarded-header reads used to derive the request host, protocol, hostname, ip, and ips values, checking the connecting address. That guard closes the IP, CIDR, and custom-function...

@agent-tool-platform/agent-kit (>=0.2.0, <=0.4.0), @agent-tool-platform/ast-summarizer (>=0.1.0, <=0.1.1) +315 more potentially affected by CVE-2026-16732 via fastify (>=5.8.3, <=5.12.0)

fastify NPM version =5.8.3, =0.2.0, =0.1.0, =0.1.0, =0.1.0, =0.0.0-vBETA-20260417080530, =0.0.1, =1.0.0, =0.0.0, =1.1.4, =4.0.0, =1.0.0-rc.2, =0.6.7, =0.6.7, =0.6.8 and more Source cves: CVE-2026-16732 Source advisory: MEND:CVE-2026-16732...

CVE-2026-16732 fastify vulnerable to X-Forwarded-* spoofing under trustProxy hop-count

fastify is a fast and low overhead web framework for Node.js. Impact: the fix for CVE-2026-3635 added a guard on the forwarded-header reads used to derive the request host, protocol, hostname, ip, and ips values, checking the connecting address. That guard closes the IP, CIDR, and custom-function...

CVE-2026-18504

fastify versions before 5.12.1 suffer a schema validation bypass: when a route schema targets a root primitive (e.g., integer), Ajv coerces the input type but Fastify passes the original uncoerced value to handlers, letting invalid data reach application logic. Upgrade to 5.12.1; no workarounds e...