Emlog up to 2.6.2 ZIP include/lib/common.php emUnZip path traversal

Summaryinfo

A vulnerability labeled as critical has been found in Emlog up to 2.6.2. Affected by this issue is the function emUnZip in the library include/lib/common.php of the component ZIP Handler. Executing a manipulation can lead to path traversal. This vulnerability is handled as CVE-2026-34607. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Emlog up to 2.6.2. It has been declared as critical. This vulnerability affects the function emUnZip in the library include/lib/common.php of the component ZIP Handler. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Emlog is an open source website building system. In versions 2.6.2 and prior, a path traversal vulnerability exists in the emUnZip() function (include/lib/common.php:793). When extracting ZIP archives (plugin/template uploads, backup imports), the function calls $zip->extractTo($path) without sanitizing ZIP entry names. An authenticated admin can upload a crafted ZIP containing entries with ../ sequences to write arbitrary files to the server filesystem, including PHP webshells, achieving Remote Code Execution (RCE). At time of publication, there are no publicly available patches.

The advisory is available at github.com. This vulnerability was named CVE-2026-34607 since 03/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/04/2026). This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

By approaching the search of inurl:include/lib/common.php it is possible to find vulnerable targets with Google Hacking.

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

Name

• Emlog

Version

• 2.6.0
• 2.6.1
• 2.6.2

Website

• Product: https://github.com/emlog/emlog/

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