---
id: CVE-2026-111181
aliases:
  - GHSA-27r3-jxmh-p828
title: >-
  body-parser vulnerable to Denial of Service via trailing bytes after a
  compressed request body
summary: >-
  body-parser vulnerable to Denial of Service via trailing bytes after a
  compressed request body
severity: high
cvss: 7.5
cwe:
  - CWE-248
vendor: body-parser
product: body-parser
ecosystem: npm
affected:
  - 'body-parser >= 2.0.0, < 2.4.0'
  - body-parser < 1.20.9
patched:
  - body-parser 2.4.0
  - body-parser 1.20.9
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T20:53:12Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-27r3-jxmh-p828'
references:
  - url: >-
      https://github.com/expressjs/body-parser/security/advisories/GHSA-27r3-jxmh-p828
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111181'
  - url: >-
      https://github.com/expressjs/body-parser/commit/1260c3845f54502a05a87594f09a334786bb34d7
  - url: >-
      https://github.com/expressjs/body-parser/commit/f7075eae3a84c3473ab4bf0a777da28db208e916
  - url: 'https://cna.openjsf.org/security-advisories.html'
  - url: 'https://github.com/expressjs/body-parser/releases/tag/1.20.9'
  - url: 'https://github.com/expressjs/body-parser/releases/tag/v2.4.0'
  - url: 'https://github.com/advisories/GHSA-27r3-jxmh-p828'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111181.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-111181'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2559049'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-111181'
tags:
  - ghsa
  - npm
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00388
epssPercentile: 0.32723
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-22T18:26:41.855566Z'
ingestedAt: '2026-10-22T22:00:50.374Z'
---

## Overview

### Impact

A single request can crash any application using `body-parser` with default options. When a request carries a `Content-Encoding` (for example `gzip`), `body-parser` pipes it into a decompression stream and, after reading the body, leaves that stream piped with no error listener. A payload of one valid compressed frame followed by trailing bytes decodes and the application responds normally, but the trailing bytes then reach the already-finished decoder, which emits an error that is re-thrown as an uncaught exception and terminates the process. No authentication or matching route is required, since parsing runs before routing.

### Patches

Fixed in body-parser 2.4.0 and 1.20.9. Upgrade to one of these versions.

### Workarounds

Pass `inflate: false` to the body-parser middleware if the application does not need to accept compressed request bodies. This rejects encoded requests before any decompression stream is created.

## Affected packages

- `body-parser >= 2.0.0, < 2.4.0`
- `body-parser < 1.20.9`

## Remediation

Upgrade to a patched release:

- `body-parser 2.4.0`
- `body-parser 1.20.9`

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111181.json)