CVE-2026-114104

adm-zip before 0.6.1 Duplicate ZIP Entry Name Validation Bypass

Published Oct 21, 2026 CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title adm-zip before 0.6.1 Duplicate ZIP Entry Name Validation Bypass
First Time appeared Adm-zip Project
Adm-zip Project adm-zip
Weaknesses CWE-436
CPEs cpe:2.3:a:adm-zip_project:adm-zip:*:*:*:*:*:*:*:*
Vendors & Products Adm-zip Project
Adm-zip Project adm-zip
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 28, 2026, 4:14 PM
Reserved
Oct 20, 2026, 9:47 PM
Status
Deferred
Published
Oct 21, 2026, 1:17 AM
Modified
Oct 28, 2026, 5:17 PM
Severity
Moderate
Public date
Oct 21, 2026, 12:37 AM