CVE-2026-102677

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From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6."}], "id": "CVE-2026-102677", "lastModified": "2026-10-08T20:24:30.737", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.1, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-102677", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-02T12:18:07.959498Z", "version": "2.0.3"}}]}, "published": "2026-09-29T18:17:09.573", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/electron/electron/pull/52480"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/electron/electron/releases/tag/v42.10.0"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/electron/electron/releases/tag/v43.5.0"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/electron/electron/releases/tag/v44.0.0-beta.6"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-345"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "electron: Electron: Privilege escalation via sandboxed preload code cache poisoning", "id": "2543491", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543491"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-829", "details": ["Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6.", "A flaw was found in Electron. The cache mechanism for sandboxed preload scripts fails to verify that cached entries match the requested script. In applications that load untrusted web content, an attacker with a compromised renderer process can write malicious data into the cache to be reused on subsequent loads. This allows the attacker to achieve privilege escalation and execute arbitrary code within the higher-privileged preload execution context."], "mitigation": {"lang": "en:us", "value": "Disable loading untrusted web content within Electron renderer processes or isolate untrusted origins into dedicated web views with disabled preload scripts."}, "name": "CVE-2026-102677", "package_state": [{"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Affected", "package_name": "rh-podman-desktop", "product_name": "Red Hat Build of Podman Desktop"}], "public_date": "2026-09-29T17:43:26Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-102677\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-102677\nhttps://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601\nhttps://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3\nhttps://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217\nhttps://github.com/electron/electron/pull/52480\nhttps://github.com/electron/electron/releases/tag/v42.10.0\nhttps://github.com/electron/electron/releases/tag/v43.5.0\nhttps://github.com/electron/electron/releases/tag/v44.0.0-beta.6\nhttps://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq"], "statement": "A flaw was found in Electron's sandboxed preload code cache mechanism. When applications load untrusted content, a compromised renderer process can write unverified cache entries that are subsequently loaded during future script executions. This allows a local attacker to execute arbitrary code within the higher-privileged preload execution context, bypassing sandbox isolation boundaries.", "threat_severity": "Important"}

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