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{"bugzilla": {"description": "electron: Electron: Context Isolation bypass via VideoFrame object transfer", "id": "2455020", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455020"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-501", "details": ["Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pass VideoFrame objects (from the WebCodecs API) across the contextBridge are vulnerable to a context isolation bypass. An attacker who can execute JavaScript in the main world (for example, via XSS) can use a bridged VideoFrame to gain access to the isolated world, including any Node.js APIs exposed to the preload script. Apps are only affected if a preload script returns, resolves, or passes a VideoFrame object to the main world via contextBridge.exposeInMainWorld(). Apps that do not bridge VideoFrame objects are not affected. This issue has been patched in versions 39.8.0, 40.7.0, and 41.0.0-beta.8.", "A flaw was found in Electron, a framework for building cross-platform desktop applications. An attacker capable of executing JavaScript in the main world, for instance through a cross-site scripting (XSS) vulnerability, could exploit this flaw. By passing VideoFrame objects from the WebCodecs API across the contextBridge, the attacker could bypass context isolation. This allows them to gain unauthorized access to the isolated world, including Node.js APIs exposed to the preload script, potentially leading to arbitrary code execution within the application."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-34780", "package_state": [{"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Affected", "package_name": "podman-desktop-macos-1-0", "product_name": "Red Hat Build of Podman Desktop"}, {"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Affected", "package_name": "podman-desktop-windows-1-0", "product_name": "Red Hat Build of Podman Desktop"}, {"cpe": "cpe:/a:redhat:podman_desktop:0", "fix_state": "Affected", "package_name": "rhdesktop/rh-podman-desktop-ext-openshift-local-rhel10", "product_name": "Red Hat Build of Podman Desktop - Tech Preview"}], "public_date": "2026-04-04T00:02:02Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34780\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34780\nhttps://github.com/electron/electron/security/advisories/GHSA-jfqg-hf23-qpw2"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[39.0.0-alpha.1,39.8.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[40.0.0-alpha.1,40.7.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[41.0.0-alpha.1,41.0.0-beta.8)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "electron", "source": "cna", "vendor": "electron"}, "product": "electron", "vendor": "electron"}], "analysis": {"en": {"generated_at": "2026-04-14T21:32:00.395712+00:00", "value": {"mitigation_remediation": ["Upgrade Electron to 39.8.0, 40.7.0, 41.0.0-beta.8, or later releases.", "Remove any usage of contextBridge.exposeInMainWorld() that passes VideoFrame objects from preload scripts.", "Limit preload scripts to expose only strictly necessary APIs and avoid peripheral Node.js exposure.", "Validate that your application does not return or resolve VideoFrame objects to the main world when not required.", "Mitigate potential XSS vulnerabilities to prevent initial renderer JavaScript injection."], "summary": {"action": "Patch Immediately", "impact": "Node.js API Exposure"}, "threat_synthesis": {"affected_systems": "Electron versions 39.0.0-alpha.1 through 39.7.x, 40.0.0-alpha.1 through 40.6.x, and 41.0.0-alpha.1 through 41.0.0-beta.7 are impacted when a preload script returns, resolves, or passes a VideoFrame object to the main world via contextBridge.exposeInMainWorld(). Versions 39.8.0, 40.7.0, and 41.0.0-beta.8 and later are patched and not affected. Applications that do not bridge VideoFrame objects are not vulnerable.", "description_and_impact": "Electron applications that use the WebCodecs API can expose VideoFrame objects to the main world via contextBridge.exposeInMainWorld(). This vulnerability creates a context isolation bypass, allowing an attacker who has already injected JavaScript into the renderer process to access the isolated preload world and any Node.js APIs available there. The weakness is captured by CWE\u20111188 (Insecure Deserialization), CWE\u2011501 (Uncontrolled Input), and CWE\u2011668 (Privilege\u2011Related Configuration Error), indicating that the bypass stems from insecure handling of data, improper input validation, and inadequate restriction of privileged operations.", "risk_and_exploitability": "The CVSS score of 8.4 signals a high\u2011severity vulnerability. Exploitation requires that the attacker first execute JavaScript in the renderer, typically through an XSS flaw, and then leverage the bridged VideoFrame to traverse the isolation boundary. The EPSS score is below 1%, suggesting a low probability of current exploitation, and the vulnerability is not listed in the CISA KEV catalog. Once an attack vector is available, the bypass effectively elevates an XSS incident into full access to Node.js APIs, enabling data theft, modification, or arbitrary code execution within the application."}}}}, "created": "2026-04-06T20:27:48.868343+00:00", "updated": "2026-04-15T16:30:09.760629+00:00", "vendors": ["electron", "electron$PRODUCT$electron"]}