High severity · published Jul 10, 2026
CVE-2026-53653
Grav: Unauthenticated denial of service via unbounded image derivative dimensions
8.7
CVSS
0.5%
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
>= 2.0.0-beta.1, < 2.0.0-rc.8; < 1.7.53 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53653
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53653
github.com
https://github.com/getgrav/grav/commit/d9f9f0369a07ae5c96cde700c7949e1237b29cf6
github.com
https://github.com/getgrav/grav/commit/f4c0f42eea755cedad6f626b342c88d4cba72174
github.com
https://github.com/getgrav/grav/releases/tag/1.7.53
github.com
https://github.com/getgrav/grav/releases/tag/2.0.0-rc.8
github.com
https://github.com/getgrav/grav/security/advisories/GHSA-4x9g-vw65-vvf9
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