Описание
A denial of service vulnerability exists in Next.js versions with Partial Prerendering (PPR) enabled when running in minimal mode. The PPR resume endpoint accepts unauthenticated POST requests with the Next-Resume: 1 header and processes attacker-controlled postponed state data. Two closely related vulnerabilities allow an attacker to crash the server process through memory exhaustion:
-
Unbounded request body buffering: The server buffers the entire POST request body into memory using
Buffer.concat()without enforcing any size limit, allowing arbitrarily large payloads to exhaust available memory. -
Unbounded decompression (zipbomb): The resume data cache is decompressed using
inflateSync()without limiting the decompressed output size. A small compressed payload can expand to hundreds of megabytes or gigabytes, causing memory exhaustion.
Both attack vectors result in a fatal V8 out-of-memory error (`FATAL ERROR: Reached heap limit Allocation failed - JavaScript hea
Ссылки
- Vendor Advisory
Уязвимые конфигурации
Одно из
EPSS
5.9 Medium
CVSS3
7.5 High
CVSS3
Дефекты
Связанные уязвимости
A denial of service vulnerability exists in Next.js versions with Partial Prerendering (PPR) enabled when running in minimal mode. The PPR resume endpoint accepts unauthenticated POST requests with the `Next-Resume: 1` header and processes attacker-controlled postponed state data. Two closely related vulnerabilities allow an attacker to crash the server process through memory exhaustion: 1. **Unbounded request body buffering**: The server buffers the entire POST request body into memory using `Buffer.concat()` without enforcing any size limit, allowing arbitrarily large payloads to exhaust available memory. 2. **Unbounded decompression (zipbomb)**: The resume data cache is decompressed using `inflateSync()` without limiting the decompressed output size. A small compressed payload can expand to hundreds of megabytes or gigabytes, causing memory exhaustion. Both attack vectors result in a fatal V8 out-of-memory error (`FATAL ERROR: Reached heap limit Allocation failed - JavaScript hea...
Next.js has Unbounded Memory Consumption via PPR Resume Endpoint
EPSS
5.9 Medium
CVSS3
7.5 High
CVSS3