Low severity · published Oct 25, 2026
CVE-2026-116137
adm-zip through 0.6.1 Duplicate-Entry Validation Bypass via Canonically Equivalent Names
New
3.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AD
adm-zip · cthackers
through 0.6.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116137
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116137
github.com
https://github.com/cthackers/adm-zip
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
github.com
https://github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/zipFile.js#L81-L92
github.com
https://github.com/cthackers/adm-zip/issues/587
www.vulncheck.com
https://www.vulncheck.com/advisories/adm-zip-through-0.6.1-duplicate-entry-validation-bypass-via-canonically-equivalent-names
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