getgrav Grav up to 1.10.54 Admin Plugin lang path traversal

Summaryinfo

A vulnerability has been found in getgrav Grav up to 1.10.54 and classified as problematic. The impacted element is an unknown function of the component Admin Plugin. This manipulation of the argument lang causes path traversal. The identification of this vulnerability is CVE-2026-85603. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in getgrav Grav up to 1.10.54. It has been declared as problematic. Affected by this vulnerability is an unknown part of the component Admin Plugin. The manipulation of the argument lang 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 integrity. The summary by CVE is:

Grav versions before 1.10.55 contain a path traversal vulnerability in the admin plugin's Save As action that fails to validate the language code parameter. An authenticated admin user with admin.pages.create permission can supply directory traversal sequences in the lang POST field to write arbitrary .md files outside the pages directory with attacker-controlled content.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-85603 since 09/04/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 1.10.55 eliminates this vulnerability.

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Productinfo

Vendor

• getgrav

Name

• Grav

Version

• 1.10.0
• 1.10.1
• 1.10.2
• 1.10.3
• 1.10.4
• 1.10.5
• 1.10.6
• 1.10.7
• 1.10.8
• 1.10.9
• 1.10.10
• 1.10.11
• 1.10.12
• 1.10.13
• 1.10.14
• 1.10.15
• 1.10.16
• 1.10.17
• 1.10.18
• 1.10.19
• 1.10.20
• 1.10.21
• 1.10.22
• 1.10.23
• 1.10.24
• 1.10.25
• 1.10.26
• 1.10.27
• 1.10.28
• 1.10.29
• 1.10.30
• 1.10.31
• 1.10.32
• 1.10.33
• 1.10.34
• 1.10.35
• 1.10.36
• 1.10.37
• 1.10.38
• 1.10.39
• 1.10.40
• 1.10.41
• 1.10.42
• 1.10.43
• 1.10.44
• 1.10.45
• 1.10.46
• 1.10.47
• 1.10.48
• 1.10.49
• 1.10.50
• 1.10.51
• 1.10.52
• 1.10.53
• 1.10.54

Website

• Product: https://github.com/getgrav/grav/

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