CVE-2026-2797

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This vulnerability was fixed in Firefox 148 and Thunderbird 148."}, {"lang": "es", "value": "Uso despu\u00e9s de liberaci\u00f3n en el componente JavaScript: GC. 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{"bugzilla": {"description": "firefox: thunderbird: Use-after-free in the JavaScript: GC component", "id": "2442330", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442330"}, "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"}, "details": ["Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 148 and Thunderbird < 148."], "name": "CVE-2026-2797", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-24T13:33:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-2797\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-2797\nhttps://www.mozilla.org/security/advisories/mfsa2026-13/#CVE-2026-2797\nhttps://www.mozilla.org/security/advisories/mfsa2026-16/#CVE-2026-2797"], "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": "[0,148)"}}], "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": "[0,148)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Thunderbird", "source": "cna", "vendor": "Mozilla"}, "product": "thunderbird", "vendor": "mozilla"}], "analysis": {"en": {"generated_at": "2026-04-15T16:04:43.841642+00:00", "value": {"mitigation_remediation": ["Upgrade Mozilla Firefox to version 148 or later to apply the use\u2011after\u2011free fix.", "Upgrade Mozilla Thunderbird to version 148 or later to apply the use\u2011after\u2011free fix.", "If an immediate upgrade cannot be performed, temporarily disable or restrict JavaScript execution in the affected applications until the patch is applied.", "Monitor application logs for crash events or abnormal memory usage that may indicate exploitation attempts."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability applies to Mozilla Firefox and Mozilla Thunderbird. Both products have incorporated the fix in release 148, so versions prior to 148 are affected while newer releases are not listed as vulnerable.", "description_and_impact": "Use\u2013after\u2013free vulnerabilities arise when an application accesses memory after it has been freed. In this instance the JavaScript garbage collector in Mozilla products can operate on deallocated objects, allowing an attacker to corrupt memory or execute arbitrary code at a chosen address. This flaw can lead to remote code execution, denial of service, or host compromise, depending on how the attacker injects malicious JavaScript.", "risk_and_exploitability": "The CVSS score of 8.8 categorizes the issue as high severity, and the EPSS score of less than 1% suggests that exploit attempts are currently infrequent but feasible. The vulnerability is not present in the CISA Known Exploited Vulnerabilities list, indicating no known mass\u2011scale exploitation. Based on the description, it is inferred that attackers would most likely leverage malicious web pages or crafted email attachments that deliver JavaScript to trigger the use\u2011after\u2011free through the applications\u2019 normal execution paths."}}}}, "created": "2026-02-25T11:39:13.354104+00:00", "updated": "2026-04-15T17:15:10.541508+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$thunderbird"]}