CVE-2026-34777

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Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, when an iframe requests fullscreen, pointerLock, keyboardLock, openExternal, or media permissions, the origin passed to session.setPermissionRequestHandler() was the top-level page's origin rather than the requesting iframe's origin. Apps that grant permissions based on the origin parameter or webContents.getURL() may inadvertently grant permissions to embedded third-party content. The correct requesting URL remains available via details.requestingUrl. Apps that already check details.requestingUrl are not affected. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0."}, {"lang": "es", "value": "Electron es un framework para escribir aplicaciones de escritorio multiplataforma usando JavaScript, HTML y CSS. Antes de las versiones 38.8.6, 39.8.1, 40.8.1 y 41.0.0, cuando un iframe solicitaba permisos de fullscreen, pointerLock, keyboardLock, openExternal o media, el origen pasado a sesi\u00f3n.setPermissionRequestHandler() era el origen de la p\u00e1gina de nivel superior en lugar del origen del iframe solicitante. Las aplicaciones que otorgan permisos bas\u00e1ndose en el par\u00e1metro de origen o webContents.getURL() pueden otorgar permisos inadvertidamente a contenido de terceros incrustado. La URL solicitante correcta permanece disponible a trav\u00e9s de details.requestingUrl. Las aplicaciones que ya verifican details.requestingUrl no se ven afectadas. Este problema ha sido parcheado en las versiones 38.8.6, 39.8.1, 40.8.1 y 41.0.0."}], "id": "CVE-2026-34777", "lastModified": "2026-07-24T22:10:00.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34777", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-06T15:32:48.135022Z", "version": "2.0.3"}}]}, "published": "2026-04-04T00:16:18.907", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "Electron: Electron: Unauthorized permission granting and information disclosure via incorrect iframe origin", "id": "2455022", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455022"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-346", "details": ["Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, when an iframe requests fullscreen, pointerLock, keyboardLock, openExternal, or media permissions, the origin passed to session.setPermissionRequestHandler() was the top-level page's origin rather than the requesting iframe's origin. Apps that grant permissions based on the origin parameter or webContents.getURL() may inadvertently grant permissions to embedded third-party content. The correct requesting URL remains available via details.requestingUrl. Apps that already check details.requestingUrl are not affected. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.", "A flaw was found in Electron, a framework for building desktop applications. When an embedded iframe requests permissions, such as for fullscreen or media access, the framework incorrectly provides the origin of the main page instead of the requesting iframe's origin. This vulnerability allows a remote attacker, through malicious embedded content, to potentially gain unauthorized permissions. This could lead to unintended information disclosure or other unauthorized actions by the third-party content within the application. The correct requesting URL remains available via details.requestingUrl. Apps that already check details.requestingUrl are not affected."], "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-2026-34777", "package_state": [{"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Fix deferred", "package_name": "podman-desktop-macos-1-0", "product_name": "Red Hat Build of Podman Desktop"}, {"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Fix deferred", "package_name": "podman-desktop-windows-1-0", "product_name": "Red Hat Build of Podman Desktop"}, {"cpe": "cpe:/a:redhat:podman_desktop:0", "fix_state": "Fix deferred", "package_name": "rhdesktop/rh-podman-desktop-ext-openshift-local-rhel10", "product_name": "Red Hat Build of Podman Desktop - Tech Preview"}], "public_date": "2026-04-03T23:57:36Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34777\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34777\nhttps://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,38.8.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[39.0.0-alpha.1,39.8.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[40.0.0-alpha.1,40.8.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[41.0.0-alpha.1,41.0.0)"}}], "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": "2026-04-04T02:50:44.850859+00:00", "value": {"mitigation_remediation": ["Upgrade Electron to version 38.8.6, 39.8.1, 40.8.1, 41.0.0 or later"], "summary": {"action": "Patch", "impact": "Improper Permission Grant via Incorrect Origin"}, "threat_synthesis": {"affected_systems": "Electron framework releases prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0 are affected. Developers who have built desktop applications with those releases and who rely on origin\u2011based permission checks are within scope. The issue pertains exclusively to the Electron:electron product and does not involve other vendors\u2019 software.", "description_and_impact": "The flaw causes Electron to pass the top\u2011level page\u2019s origin instead of the iframe\u2019s origin when a fullscreen, pointer lock, keyboard lock, open external, or media request is made. Applications that grant permissions based on the origin parameter or the result of webContents.getURL() may therefore incorrectly grant elevated rights to third\u2011party iframe content. The mistake enables the application to give sensitive privileges to embedded sites without the user\u2019s explicit consent.", "risk_and_exploitability": "The vulnerability has a CVSS score of 5.4, indicating moderate severity. No EPSS score is provided and the flaw is not listed in CISA\u2019s KEV catalog. Exploitation requires the attacker to supply or control an iframe within the application and rely on the application\u2019s permission handling logic. If the application correctly checks the details.requestingUrl field, the vulnerability is effectively mitigated. Therefore, the practical risk is moderate when such checks are in place, but higher if the application grants based on the incorrect origin."}}}}, "created": "2026-04-06T20:27:51.784238+00:00", "updated": "2026-04-06T22:21:10.961460+00:00", "vendors": ["electron", "electron$PRODUCT$electron"]}