CVE-2026-56876

extract-zip does not validate symlink targets when extracting zip archives. When processing a malicious zip file containing a symlink with a relative path like '../../../../etc/passwd', extract-zip will extract the symlink without validation, allowing it to point outside the extraction directory. Depending on how extract-zip is used, an attacker could read or write to arbitrary files.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/ziad626/extract-zip-security-research/security/advisories/GHSA-x7jf-2287-qcpf	Exploit Third Party Advisory
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-177-01.json	Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-56876	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:max-mapper:extract-zip:*:*:*:*:*:node.js:*:*

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) extract-zip no valida los destinos de los enlaces simbólicos al extraer archivos zip. Al procesar un archivo zip malicioso que contiene un enlace simbólico con una ruta relativa como ’.. / .. / .. / .. / etc/p4ssd’, extract-zip extraerá el enlace simbólico sin validación, permitiendo que apunte fuera del directorio de extracción. Dependiendo de cómo se utilice extract-zip, un atacante podría leer o escribir en archivos arbitrarios.

Information

Published : 2026-06-26 18:17

Updated : 2026-10-25 17:10

NVD link : CVE-2026-56876

Mitre link : CVE-2026-56876

CVE.ORG link : CVE-2026-56876

JSON object : View

Products Affected

max-mapper

extract-zip

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-61

UNIX Symbolic Link (Symlink) Following

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When processing a malicious zip file containing a symlink with a relative path like '../../../../etc/passwd', extract-zip will extract the symlink without validation, allowing it to point outside the extraction directory. Depending on how extract-zip is used, an attacker could read or write to arbitrary files."}, {"lang": "es", "value": "extract-zip no valida los destinos de los enlaces simb\u00f3licos al extraer archivos zip. Al procesar un archivo zip malicioso que contiene un enlace simb\u00f3lico con una ruta relativa como \u2019.. / .. / .. / .. / etc/p4ssd\u2019, extract-zip extraer\u00e1 el enlace simb\u00f3lico sin validaci\u00f3n, permitiendo que apunte fuera del directorio de extracci\u00f3n. Dependiendo de c\u00f3mo se utilice extract-zip, un atacante podr\u00eda leer o escribir en archivos arbitrarios."}], "lastModified": "2026-10-25T17:10:00.197", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:max-mapper:extract-zip:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "F89CEAB5-8D4C-49C7-A896-9E45870F5293", "versionEndIncluding": "2.0.1"}], "operator": "OR"}]}], "sourceIdentifier": "9119a7d8-5eab-497f-8521-727c672e3725"}