{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33687","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-23T16:34:59.932Z","datePublished":"2026-03-26T21:47:55.573Z","dateUpdated":"2026-03-27T20:28:53.385Z"},"containers":{"cna":{"title":"Sharp has Unrestricted File Upload via Client-Controlled Validation Rules","problemTypes":[{"descriptions":[{"cweId":"CWE-434","lang":"en","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/code16/sharp/security/advisories/GHSA-fr76-5637-w3g9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/code16/sharp/security/advisories/GHSA-fr76-5637-w3g9"},{"name":"https://github.com/code16/sharp/pull/714","tags":["x_refsource_MISC"],"url":"https://github.com/code16/sharp/pull/714"},{"name":"https://github.com/code16/sharp/releases/tag/v9.20.0","tags":["x_refsource_MISC"],"url":"https://github.com/code16/sharp/releases/tag/v9.20.0"},{"name":"https://laravel.com/docs/13.x/filesystem","tags":["x_refsource_MISC"],"url":"https://laravel.com/docs/13.x/filesystem"}],"affected":[{"vendor":"code16","product":"sharp","versions":[{"version":"< 9.20.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-26T21:53:26.004Z"},"descriptions":[{"lang":"en","value":"Sharp is a content management framework built for Laravel as a package. Versions prior to 9.20.0 contain a vulnerability in the file upload endpoint that allows authenticated users to bypass all file type restrictions. The upload endpoint within the `ApiFormUploadController` accepts a client-controlled `validation_rule` parameter. This parameter is directly passed into the Laravel validator without sufficient server-side enforcement. By intercepting the request and sending `validation_rule[]=file`, an attacker can completely bypass all MIME type and file extension restrictions. This issue has been addressed in version 9.20.0 by removing the client-controlled validation rules and strictly defining upload rules server-side. As a workaround, ensure that the storage disk used for Sharp uploads is strictly private. Under default configurations, an attacker cannot directly execute uploaded PHP files unless a public disk configuration is explicitly used."}],"source":{"advisory":"GHSA-fr76-5637-w3g9","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-27T20:28:24.566534Z","id":"CVE-2026-33687","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-27T20:28:53.385Z"}}]}}