CVE-2026-53653: Grav: Unauthenticated denial of service via unbounded image derivative dimensions
An unauthenticated visitor exhausts server memory and CPU by requesting an image with oversized resize dimensions. One request drives a worker to several gigabytes of RAM and tens of seconds of CPU. A few concurrent requests take the host down.
References
- github.com/advisories/GHSA-4x9g-vw65-vvf9
- github.com/getgrav/grav/commit/d9f9f0369a07ae5c96cde700c7949e1237b29cf6
- github.com/getgrav/grav/commit/f4c0f42eea755cedad6f626b342c88d4cba72174
- github.com/getgrav/grav/releases/tag/1.7.53
- github.com/getgrav/grav/releases/tag/2.0.0-rc.8
- github.com/getgrav/grav/security/advisories/GHSA-4x9g-vw65-vvf9
- nvd.nist.gov/vuln/detail/CVE-2026-53653
Code Behaviors & Features
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