ApostropheCMS up to 1.27.9 uploadfs path traversal

Summaryinfo

A vulnerability marked as problematic has been reported in ApostropheCMS up to 1.27.9. The affected element is an unknown function of the component uploadfs. This manipulation causes path traversal. This vulnerability appears as CVE-2026-113651. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in ApostropheCMS up to 1.27.9 and classified as problematic. Affected by this vulnerability is an unknown code of the component uploadfs. 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. The summary by CVE is:

ApostropheCMS is an open-source Node.js content management system, and uploadfs is its file storage library. Prior to uploadfs 1.28.0, attacker-controlled paths that reach the local backend can contain parent-directory segments that escape the configured upload directory and affect file reads, writes, and deletion on the host filesystem. Exploitability depends on an application exposing the relevant uploadfs operations to untrusted path. This issue is fixed in uploadfs 1.28.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-113651 since 10/20/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 1.28.0 eliminates this vulnerability.

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Productinfo

Name

• ApostropheCMS

Version

• 1.27.0
• 1.27.1
• 1.27.2
• 1.27.3
• 1.27.4
• 1.27.5
• 1.27.6
• 1.27.7
• 1.27.8
• 1.27.9

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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