CVE-2026-53653 json
Grav: Unauthenticated denial of service via unbounded image derivative dimensions
published 2026-07-10 4 mo ago modified 2026-10-25 14 d ago also GHSA-4x9g-vw65-vvf9 , EUVD-2026-42943
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist getgrav/grav 1.7.53, 2.0.0-rc.8
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 4.0 | 8.7 | 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | getgrav/grav | >=2.0.0-beta.1, <2.0.0-rc.8 <1.7.53 |
2.0.0-rc.8 1.7.53 |
Affected products
- getgrav grav
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
github.com
/getgrav/grav/commit/d9f9f0369a07ae5c96cde700c7949e1237b29cf6
web
-
github.com
/getgrav/grav/commit/f4c0f42eea755cedad6f626b342c88d4cba72174
web
-
github.com
/getgrav/grav/security/advisories/GHSA-4x9g-vw65-vvf9
web
-
github.com
/getgrav/grav/releases/tag/1.7.53
web
-
github.com
/getgrav/grav/releases/tag/2.0.0-rc.8
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-53653
advisory
-
github.com
/getgrav/grav
package
Sources
- CVE List CVE-2026-53653
- GitHub Advisory GHSA-4x9g-vw65-vvf9
- NVD CVE-2026-53653
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