CVE-2026-116137
adm-zip through 0.6.1 Duplicate-Entry Validation Bypass via Canonically Equivalent Names
CVSS Score
3.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-436 |
| Vendor | cthackers |
| Product | adm-zip |
| Published | Oct 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for cthackers adm-zip
Be the first to know when new low vulnerabilities affecting cthackers adm-zip are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
cthackers / adm-zip
0 ≤ 0.6.1
References
github.com: https://github.com/cthackers/adm-zip/issues/587 github.com: https://github.com/cthackers/adm-zip github.com: https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/zipFile.js#L81-L92 github.com: https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/adm-zip.js#L87 github.com: https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/util/utils.js#L383 vulncheck.com: https://www.vulncheck.com/advisories/adm-zip-through-0.6.1-duplicate-entry-validation-bypass-via-canonically-equivalent-names
Credits
Arjun Jain