CVE-2026-19484

@fastify/busboy is a multipart form-data parser. In versions 3.1.0 through 3.2.0, a remote unauthenticated attacker can stall the Node.js event loop by sending a multipart request whose boundary is crafted to a specific length. The vendored streaming search stores its skip table in a fixed 256...

CVE-2026-19481 @fastify/busboy vulnerable to Denial of Service via prototype-named multipart part header

@fastify/busboy is a multipart form-data parser. In versions 1.0.0 through 3.2.0, an attacker who can submit multipart form-data can crash the parser by sending a part header whose name is a prototype-inherited property such as proto or constructor. The internal header parser stores headers in a...

0xble (>=22.0.0, <=23.2.2), 0xsodium (>=0.2.0, <=0.14.0) +14135 more potentially affected by CVE-2026-19481 via @fastify/busboy (>=1.0.0, <=3.2.0)

@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-2026-19481 Source advisory: MEND:CVE-2026-19481...

CVE-2026-19481

Summary: CVE-2026-19481 affects the multipart-form data parser in the @fastify/busboy package (versions 1.0.0–3.2.0). An attacker can submit multipart data with a part header named after a prototype-inherited property (e.g., proto , constructor), causing the header parser (which stores headers in...

CVE-2026-19481

@fastify/busboy is a multipart form-data parser. In versions 1.0.0 through 3.2.0, an attacker who can submit multipart form-data can crash the parser by sending a part header whose name is a prototype-inherited property such as proto or constructor. The internal header parser stores headers in a...

CVE-2026-19481 @fastify/busboy vulnerable to Denial of Service via prototype-named multipart part header

@fastify/busboy is a multipart form-data parser. In versions 1.0.0 through 3.2.0, an attacker who can submit multipart form-data can crash the parser by sending a part header whose name is a prototype-inherited property such as proto or constructor. The internal header parser stores headers in a...

CVE-2026-19484: Loop with Unreachable Exit Condition

@fastify/busboy is a multipart form-data parser. In versions 3.1.0 through 3.2.0, a remote unauthenticated attacker can stall the Node.js event loop by sending a multipart request whose boundary is crafted to a specific length. The vendored streaming search stores its skip table in a fixed 256...

PT-2026-71408

Name of the Vulnerable Software and Affected Versions @fastify/busboy versions 3.1.0 through 3.2.0 Description A remote unauthenticated attacker can cause a Denial of Service by stalling the Node.js event loop. This occurs when a multipart request is sent with a boundary crafted to exactly 252...

PT-2026-71407

Name of the Vulnerable Software and Affected Versions @fastify/busboy versions 1.0.0 through 3.2.0 Description An unauthenticated denial of service can occur when an attacker submits multipart form-data containing a part header with a name that is a prototype-inherited property, such as proto or...

CVE-2026-19481: Improper Check for Unusual or Exceptional Conditions

@fastify/busboy is a multipart form-data parser. In versions 1.0.0 through 3.2.0, an attacker who can submit multipart form-data can crash the parser by sending a part header whose name is a prototype-inherited property such as proto or constructor. The internal header parser stores headers in a...