---
id: "CVE-2026-114102"
kind: "vulnerability"
aliases: ["CVE-2026-114102"]
title: "adm-zip: malformed ZIP crashes Node.js process via missing error listener"
severity: "high"
cvss: 8.7
epss: 0.00291
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["adm-zip", "file-upload", "node.js", "package", "self-hosted"]
not_affected_if: ["no-untrusted-zip-input", "sync-api-only", "version-0.6.1-or-later"]
published_at: "2026-10-21T01:17:35+00:00"
first_seen_at: "2026-10-23T21:57:28+00:00"
updated_at: "2026-10-24T13:15:54+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114102", "first_seen_at": "2026-10-23T21:57:28+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-114102", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# adm-zip: malformed ZIP crashes Node.js process via missing error listener

adm-zip before 0.6.1 does not handle zlib stream errors in its async inflater, so a ZIP with corrupted DEFLATE data throws an uncatchable exception. An unauthenticated attacker who can get such a file processed can crash the whole Node.js process and drop all in-flight requests.

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

## How to check

Run `npm ls adm-zip` in each project and check whether the resolved version is below 0.6.1.
Look for code calling readFileAsync, readAsTextAsync, extractAllToAsync or getDataAsync on untrusted uploads.

## Fix

Upgrade adm-zip to 0.6.1 or later.
Until then, avoid the async APIs listed above on untrusted input or validate archives before processing.

## Timeline

- 2026-10-23T21:57:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114102
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-114102

## From the sources

adm-zip before 0.6.1 contains a denial of service vulnerability that allows unauthenticated attackers to crash the Node.js process via a malformed ZIP file, because inflateAsync in methods/inflater.js lacks a zlib stream error listener. Attackers can supply a ZIP with corrupted DEFLATE data processed by readFileAsync, readAsTextAsync, extractAllToAsync, or getDataAsync, triggering an uncatchable exception that terminates all in-flight requests.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_