Vulnerability details
CVE-2026-53653
getgrav grav
Grav: Unauthenticated denial of service via unbounded image derivative dimensions
CVSS 4.0
8.7High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| getgrav | grav | < 1.7.53 | CVEProject cvelistV5 (CNA) |
| getgrav | grav | >= 2.0.0-beta.1, < 2.0.0-rc.8 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://github.com/getgrav/grav/security/advisories/GHSA-4x9g-vw65-vvf9 x_refsource_CONFIRM
- https://github.com/getgrav/grav/commit/d9f9f0369a07ae5c96cde700c7949e1237b29cf6 x_refsource_MISC
- https://github.com/getgrav/grav/commit/f4c0f42eea755cedad6f626b342c88d4cba72174 x_refsource_MISC
- https://github.com/getgrav/grav/releases/tag/1.7.53 x_refsource_MISC
- https://github.com/getgrav/grav/releases/tag/2.0.0-rc.8 x_refsource_MISC
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Details
- Published
- 2026-07-10
- Last updated
- 2026-07-11
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.52%
Probability of exploitation in 30 days
44.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-770Allocation of Resources Without Limits or Throttling