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{"bugzilla": {"description": "firefox: Same-origin policy bypass in the Networking: JAR component", "id": "2442313", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442313"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-2790", "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:6", "fix_state": "Out of support scope", "package_name": "firefox", "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:8", "fix_state": "Affected", "package_name": "firefox", "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"}], "public_date": "2026-02-24T13:33:21Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-2790\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-2790\nhttps://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2790"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,148)"}}], "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": "[0,140.8)"}}], "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": "[0,148)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Thunderbird", "source": "cna", "vendor": "Mozilla"}, "product": "thunderbird", "vendor": "mozilla"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,140.8)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Thunderbird", "source": "cna", "vendor": "Mozilla"}, "product": "thunderbird", "vendor": "mozilla"}], "analysis": {"en": {"generated_at": "2026-04-15T16:06:56.850574+00:00", "value": {"mitigation_remediation": ["Upgrade Mozilla Firefox to version 148 or later (including ESR 140.8) on all affected systems.", "Upgrade Mozilla Thunderbird to version 148 or later (including ESR 140.8) on all affected systems.", "If a patch cannot be applied immediately, configure the browser to disable the Networking: JAR component or block untrusted JAR URLs through policy settings."], "summary": {"action": "Patch Immediately", "impact": "Same\u2011origin policy bypass"}, "threat_synthesis": {"affected_systems": "Mozilla\u2019s Firefox and Thunderbird browsers are affected. All pre\u2011patched releases, including standard Firefox, Firefox ESR 140.8, Thunderbird, and Thunderbird ESR 140.8, remain vulnerable until updated to Firefox 148 or later and Thunderbird 148 or later.", "description_and_impact": "This flaw, identified as CWE\u2011346, allows an attacker to bypass the same\u2011origin policy in the Networking: JAR component, enabling the execution of code or access to data that would normally be restricted to a different origin. The vulnerability could let an attacker deliver malicious JAR files or read sensitive information from trusted origins, potentially compromising confidentiality, integrity, and availability of the affected system.", "risk_and_exploitability": "The CVSS score of 8.8 marks it as a high\u2011severity issue. The EPSS score of less than 1% indicates a low but non\u2011zero probability of exploitation in the wild, and it is not listed in the CISA KEV catalog. Although the exact attack vector is not detailed in the advisory, the nature of the flaw suggests it can be triggered by a malicious web page or by locally crafted content that exploits the JAR component to read or execute content across origins."}}}}, "created": "2026-02-25T11:39:21.068996+00:00", "updated": "2026-04-15T17:15:10.551931+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr", "mozilla$PRODUCT$thunderbird"]}