All vulnerabilities
CVE-2026-114104GHSA-p634-w6r4-rjp2

adm-zip before 0.6.1 Duplicate ZIP Entry Name Validation Bypass

cthackers adm-zipnpmLibraries & packages
Open in ThreatlineRecord JSON
CVSS
8.2High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.23%Chance of exploitation activity in the next 30 days, higher than 13% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0.6.1Fixed versionCVE List
Published21 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

  • 0.6.1adm-zipCVE List
  • 0.6.1adm-zip, npmOSVnpm install adm-zip@0.6.1

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

adm-zip before 0.6.1 contains an inconsistent entry resolution vulnerability that allows attackers to bypass content validation by supplying ZIP archives with duplicate entry names. Attackers can craft archives where getEntry() returns the last duplicate while extractAllTo() writes the first, causing unvalidated bytes to be written to disk.

Text from CVE List

Affected versions 3

  • adm-zipaffected: all versions before 0.6.1CVE List
  • adm-zipunaffected: 0.6.1CVE List
  • adm-zip, npmfrom first release, fixed in 0.6.1OSV

References 2