CVE-2026-53653

HIGH

Grav: Unauthenticated denial of service via unbounded image derivative dimensions

Title source: cna
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v4 8.7
EPSS 0.0030
EPSS Percentile 22.4%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (2)
getgrav/grav < 1.7.53
getgrav/grav >= 2.0.0-beta.1, < 2.0.0-rc.8
Published Jul 10, 2026
Tracked Since Jul 10, 2026