CVE-2026-5904

// PoC Concept for CVE-2026-5904 // This code demonstrates the trigger logic within a malicious Chrome Extension context. // It attempts to manipulate V8 objects to cause a Use After Free condition. function triggerUAF() { // Step 1: Allocate an object in V8 heap let vulnerableObject = { data: new ArrayBuffer(1024), vptr: 0x41414141 }; // Step 2: Perform operations that lead to object being freed // Simulating a specific garbage collection or object lifecycle manipulation // specific to the vulnerable version of V8. someComplexV8Operation(vulnerableObject); // Step 3: Attempt to access the freed memory (Use After Free) // If successful, this dereferences a dangling pointer leading to heap corruption. try { console.log(vulnerableObject.vptr); // Corrupting the heap to potentially gain code execution } catch (e) { console.log("Exploit failed or patched."); } } // Simulated internal function representing the vulnerable path function someComplexV8Operation(obj) { // Hypothetical logic that frees 'obj' but leaves a reference // ... implementation depends on specific V8 internals ... } triggerUAF();

{"cve": {"id": "CVE-2026-5904", "sourceIdentifier": "[email protected]", "published": "2026-04-08T22:16:30.287", "lastModified": "2026-04-13T21:13:50.300", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in V8 in Google Chrome prior to 147.0.7727.55 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension. (Chromium security severity: Low)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "147.0.7727.55", "matchCriteriaId": "9A68673A-1331-48AF-8860-53064F0AF310"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/483851888", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}