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This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9."}, {"lang": "es", "value": "Escape de sandbox debido a condiciones de l\u00edmite incorrectas en el componente de Telemetr\u00eda. 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{"bugzilla": {"description": "firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component", "id": "2450757", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450757"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-501", "details": ["A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:\nSandbox escape due to incorrect boundary conditions in the Telemetry component"], "name": "CVE-2026-4687", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-24T12:30:22Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-4687\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-4687\nhttps://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4687\nhttps://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4687"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,149)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox", "source": "cna", "vendor": "Mozilla"}, "product": "firefox", "vendor": "mozilla"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,115.34)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox ESR", "source": "cna", "vendor": "Mozilla"}, "product": "firefox_esr", "vendor": "mozilla"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,140.9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox ESR", "source": "cna", "vendor": "Mozilla"}, "product": "firefox_esr", "vendor": "mozilla"}], "analysis": {"en": {"generated_at": "2026-04-13T15:53:26.662816+00:00", "value": {"mitigation_remediation": ["Update Mozilla Firefox to version 149 or newer, or to ESR 115.34 or ESR 140.9.", "Update Mozilla Thunderbird to version 149 or newer, or to ESR 140.9.", "If an update cannot be applied immediately, stay informed by checking Mozilla\u2019s security advisories and apply the patch as soon as possible."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Mozilla products are impacted, namely Firefox and Thunderbird. Versions prior to Firefox 149, Firefox ESR 115.34 and 140.9, and Thunderbird 149 or 140.9 contain the vulnerability, while the listed releases contain the fix.", "description_and_impact": "The flaw stems from incorrect boundary checks in the telemetry component, allowing an attacker to escape the browser sandbox and execute code with elevated privileges. This type of memory corruption can compromise the confidentiality, integrity, and availability of the affected system, and is rated with a CVSS score of 9.6, indicating critical severity.", "risk_and_exploitability": "The EPSS score of less than 1% suggests that active exploitation has not been observed, and the vulnerability is not in the CISA KEV catalog. Nevertheless, the high severity and sandbox escape mechanism mean that an attacker who can trigger the flaw\u2014through malicious telemetry data or compromised extensions\u2014could achieve full system compromise. The risk remains high until the necessary updates are applied."}}}}, "created": "2026-03-25T11:48:21.709200+00:00", "updated": "2026-04-14T16:43:43.422081+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr"]}