CVE-2026-53653CWE-770

Grav: Unauthenticated denial of service via unbounded image derivative dimensions

High · published July 10, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
43.6
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
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
EPSS
0.00524 · 43.6th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-07-10T16:12Z
EPSS history
Timeline
  • 10 JUL 16:12Z
    Grav: Unauthenticated denial of service via unbounded image derivative dimensions
    cvelistv5