adm-zip through 0.6.1 contains a duplicate-entry validation bypass that allows attackers to evade the readEntries() check by using canonically equivalent entry names like './hello.txt' and 'hello.txt'. Attackers can craft ZIP archives where getEntry() or readAsText() validates benign content while extractAllTo() writes malicious content to the same path, bypassing integrity checks.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
cthackers adm-zip unaffected
Version Status Constraints
0 affected ≤ 0.6.1

No data.

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Project Subscriptions

Vendors Products
Adm-zip Project Subscribe
Adm-zip Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/cthackers/adm-zip cve-icon cve-icon
https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/adm-zip.js#L87 cve-icon cve-icon
https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/util/utils.js#L383 cve-icon cve-icon
https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/zipFile.js#L81-L92 cve-icon cve-icon
https://github.com/cthackers/adm-zip/issues/587 cve-icon cve-icon
https://www.vulncheck.com/advisories/adm-zip-through-0.6.1-duplicate-entry-validation-bypass-via-canonically-equivalent-names cve-icon cve-icon
History

Sun, 25 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Description adm-zip through 0.6.1 contains a duplicate-entry validation bypass that allows attackers to evade the readEntries() check by using canonically equivalent entry names like './hello.txt' and 'hello.txt'. Attackers can craft ZIP archives where getEntry() or readAsText() validates benign content while extractAllTo() writes malicious content to the same path, bypassing integrity checks.
Title adm-zip through 0.6.1 Duplicate-Entry Validation Bypass via Canonically Equivalent Names
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': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-25T11:51:01.980Z

Reserved: 2026-10-25T11:15:17.810Z

Link: CVE-2026-116137

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-25T12:16:30.250

Modified: 2026-10-25T12:16:30.373

Link: CVE-2026-116137

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses