---
id: "CVE-2026-65833"
page: "https://infrastack.ai/live/CVE-2026-65833"
kind: "vulnerability"
aliases: ["CVE-2026-65833"]
title: "iopress: chunked request parser over-reads memory, patched in 1.0.5"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["http-server", "iopress", "node.js", "package"]
not_affected_if: ["fixed-version", "not-using-iopress"]
published_at: "2026-11-11T19:17:43+00:00"
first_seen_at: "2026-11-11T19:28:47+00:00"
updated_at: "2026-11-11T19:30:14+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65833", "first_seen_at": "2026-11-11T19:28:47+00:00"}]
exploit_sources: []
---

# iopress: chunked request parser over-reads memory, patched in 1.0.5

Link for people: https://infrastack.ai/live/CVE-2026-65833 (this .md is for agents)

iopress is a native HTTP server for Node.js. Its chunked-transfer request parser in @iopress/core reads past the end of the input buffer when a chunk size exceeds the received body, a heap-buffer-over-read.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed `@iopress/core` version with `npm ls @iopress/core`
- Look for `iopress` or `@iopress/core` in `package.json` and the lockfile

## Fix

- `@iopress/core` to `1.0.5` or later

## Timeline

- 2026-11-11T19:28:47+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-65833

## Documents

- [advisory] Vendor advisory: github.com https://github.com/senapati484/iopress/security/advisories/GHSA-pvr5-58cf-rgv6
- [fix] Release notes: github.com https://github.com/senapati484/iopress/releases/tag/v1.0.5

## From the sources

iopress is a native HTTP server for Node.js with platform-specific async I/O. Prior to version 1.0.5, the chunked-transfer-encoding HTTP request parser in @iopress/core reads past the end of the input buffer when a request declares a chunk size larger than the body actually received. This results in a heap-buffer-over-read. This issue has been patched in version 1.0.5.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_