{"id":"CVE-2026-53653","state":"PUBLISHED","title":"Grav: Unauthenticated denial of service via unbounded image derivative dimensions","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.","publishedAt":"2026-07-10T16:12:01.576Z","updatedAt":"2026-07-10T20:58:50.005Z","severity":{"score":8.7,"label":"High","version":"4.0","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","source":"GitHub_M"},"assigner":"GitHub_M","products":["getgrav grav"],"affected":[{"vendor":"getgrav","product":"grav","versions":[{"version":">= 2.0.0-beta.1, < 2.0.0-rc.8","status":"affected"},{"version":"< 1.7.53","status":"affected"}]}],"references":["https://github.com/getgrav/grav/security/advisories/GHSA-4x9g-vw65-vvf9","https://github.com/getgrav/grav/commit/d9f9f0369a07ae5c96cde700c7949e1237b29cf6","https://github.com/getgrav/grav/commit/f4c0f42eea755cedad6f626b342c88d4cba72174","https://github.com/getgrav/grav/releases/tag/1.7.53","https://github.com/getgrav/grav/releases/tag/2.0.0-rc.8"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53653.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53653","state":"PUBLISHED","datePublished":"2026-07-10T16:12:01.576Z","dateUpdated":"2026-07-10T20:58:50.005Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-09T20:50:36.876Z"},"containers":{"cna":{"title":"Grav: Unauthenticated denial of service via unbounded image derivative dimensions","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"getgrav","product":"grav","versions":[{"version":">= 2.0.0-beta.1, < 2.0.0-rc.8","status":"affected"},{"version":"< 1.7.53","status":"affected"}]}],"references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-4x9g-vw65-vvf9","name":"https://github.com/getgrav/grav/security/advisories/GHSA-4x9g-vw65-vvf9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/getgrav/grav/commit/d9f9f0369a07ae5c96cde700c7949e1237b29cf6","name":"https://github.com/getgrav/grav/commit/d9f9f0369a07ae5c96cde700c7949e1237b29cf6","tags":["x_refsource_MISC"]},{"url":"https://github.com/getgrav/grav/commit/f4c0f42eea755cedad6f626b342c88d4cba72174","name":"https://github.com/getgrav/grav/commit/f4c0f42eea755cedad6f626b342c88d4cba72174","tags":["x_refsource_MISC"]},{"url":"https://github.com/getgrav/grav/releases/tag/1.7.53","name":"https://github.com/getgrav/grav/releases/tag/1.7.53","tags":["x_refsource_MISC"]},{"url":"https://github.com/getgrav/grav/releases/tag/2.0.0-rc.8","name":"https://github.com/getgrav/grav/releases/tag/2.0.0-rc.8","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-10T16:12:01.576Z"},"source":{"advisory":"GHSA-4x9g-vw65-vvf9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-10T20:53:11.243262Z","id":"CVE-2026-53653","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-10T20:58:50.005Z"}}]}}}