max-mapper extract-zip ZIP path traversal

Summaryinfo

A vulnerability labeled as critical has been found in max-mapper extract-zip. This impacts an unknown function of the component ZIP Handler. The manipulation results in path traversal. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability was named CVE-2026-56876. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in max-mapper extract-zip (the affected version unknown). Affected is an unknown part of the component ZIP Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-56876 since 06/23/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/26/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• max-mapper

Name

• extract-zip

Support

• end of life

CPE 2.3info

• 🔒

CPE 2.2info

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