Vulnerability · Published Oct 21, 2026 · Assigned by VulnCheck

CVE-2026-114103adm-zip 0.6.0 Decompression Bomb Guard Bypass via getDataAsync()

Medium 5.3

In plain English

A medium-severity uncontrolled resource consumption in adm-zip from cthackers. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 65.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

adm-zip 0.6.0 contains a decompression bomb protection bypass that allows attackers to evade the maxOutputLength guard by targeting the asynchronous getDataAsync() path in methods/inflater.js. Attackers can craft ZIP entries with falsified small declared sizes and high-ratio DEFLATE payloads to exhaust memory in applications reading entries asynchronously.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	adm-zip	0.6.1	GHSA-c6fg-446q-cg94

Affected products (as reported)

Vendor	Product	Versions
cthackers	adm-zip	0.6.0 – before 0.6.1

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

GitHub Security Advisory (GHSA-c6fg-446q-cg94) vendor-advisory
VulnCheck Advisory: adm-zip 0.6.0 Decompression Bomb Guard Bypass via getDataAsync() third-party-advisory