CVE-2026-8092

/* * PoC for CVE-2026-8092 (Conceptual) * This PoC demonstrates a potential trigger for memory corruption in vulnerable versions of Thunderbird. * It attempts to manipulate memory layout to cause a crash. */ function triggerVuln() { // Simulate memory allocation patterns that might lead to corruption let buffers = []; for (let i = 0; i < 1000; i++) { buffers.push(new Uint8Array(1024 * 1024)); // 1MB buffers } // Attempt to trigger use-after-free or overflow scenario // Actual exploit logic depends on specific bug details (UAF, Buffer Overflow, etc.) try { let obj = document.createElement('object'); document.body.appendChild(obj); document.body.removeChild(obj); // Accessing the freed object reference if (obj) { console.log("Potential memory access on freed object"); } } catch (e) { console.log("Error: " + e.message); } } triggerVuln();

{"cve": {"id": "CVE-2026-8092", "sourceIdentifier": "[email protected]", "published": "2026-05-07T13:16:14.203", "lastModified": "2026-05-11T15:16:40.053", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Memory safety bugs present in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-416"}, {"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "versionEndExcluding": "115.35.2", "matchCriteriaId": "AF96A878-0508-42AF-A345-ACBC2FE28DD2"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "versionStartIncluding": "140.0", "versionEndExcluding": "140.10.2", "matchCriteriaId": "3BBAB7A3-2FBF-440E-88B4-8C6FB332F790"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "versionStartIncluding": "150.0", "versionEndExcluding": "150.0.2", "matchCriteriaId": "667A6A10-6C88-472B-9CF0-108744732F32"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*", "versionStartIncluding": "140.0", "versionEndExcluding": "140.10.2", "matchCriteriaId": "239DA52B-4EB1-4294-9FBB-88F26B6C74F1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*", "versionStartIncluding": "150.0", "versionEndExcluding": "150.0.2", "matchCriteriaId": "2279D441-7CD1-4BCB-8D17-B889225EA2E7"}]}]}], "references": [{"url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1806249%2C2021977%2C2022576%2C2022722%2C2024439%2C2027883%2C2029463%2C2030323%2C2032042%2C2032043%2C2033270%2C2033637%2C2034422%2C2034496%2C2035879%2C2036516", "source": "[email protected]", "tags": ["Broken Link"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-40/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-41/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-42/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-43/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-44/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}