getgrav Grav up to 1.7.52 ImageMedium fallbackUrl forceResize resource consumption

Summaryinfo

A vulnerability, which was classified as problematic, was found in getgrav Grav up to 1.7.52. This impacts the function fallbackUrl of the component ImageMedium. Such manipulation of the argument forceResize leads to resource consumption. This vulnerability is referenced as CVE-2026-53653. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in getgrav Grav up to 1.7.52. It has been rated as problematic. Affected by this issue is the function fallbackUrl of the component ImageMedium. The manipulation of the argument forceResize with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

Grav is a file-based Web platform. Prior to 1.7.53 and 2.0.0-rc.8, Grav allows an unauthenticated visitor to exhaust server memory and CPU by requesting image derivatives with oversized dimensions through URL query image actions such as forceResize in Grav::fallbackUrl, which passes request parameters to ImageMedium magic actions without a dimension or pixel ceiling. This issue is fixed in versions 1.7.53 and 2.0.0-rc.8.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-53653 since 06/09/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 1.7.53 or 2.0.0-rc.8 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• getgrav

Name

• Grav

Version

• 1.7.0
• 1.7.1
• 1.7.2
• 1.7.3
• 1.7.4
• 1.7.5
• 1.7.6
• 1.7.7
• 1.7.8
• 1.7.9
• 1.7.10
• 1.7.11
• 1.7.12
• 1.7.13
• 1.7.14
• 1.7.15
• 1.7.16
• 1.7.17
• 1.7.18
• 1.7.19
• 1.7.20
• 1.7.21
• 1.7.22
• 1.7.23
• 1.7.24
• 1.7.25
• 1.7.26
• 1.7.27
• 1.7.28
• 1.7.29
• 1.7.30
• 1.7.31
• 1.7.32
• 1.7.33
• 1.7.34
• 1.7.35
• 1.7.36
• 1.7.37
• 1.7.38
• 1.7.39
• 1.7.40
• 1.7.41
• 1.7.42
• 1.7.43
• 1.7.44
• 1.7.45
• 1.7.46
• 1.7.47
• 1.7.48
• 1.7.49
• 1.7.50
• 1.7.51
• 1.7.52

Website

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

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