CVE-2026-53653 json
Grav: Unauthenticated denial of service via unbounded image derivative dimensions
published 4mo ago modified 17d ago also EUVD-2026-42943 , GHSA-4x9g-vw65-vvf9
- 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
- getgrav grav 1.7.53, 2.0.0-rc.8
- getgrav grav_cms 1.7.53, 2.0.0-rc.8
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-11).
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
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.