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{"bugzilla": {"description": "firefox: thunderbird: Spoofing issue in the WebAuthn component in Firefox for Android", "id": "2442299", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442299"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "draft"}, "details": ["Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 148 and Thunderbird < 148."], "name": "CVE-2026-2800", "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": "2026-02-24T13:33:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-2800\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-2800\nhttps://www.mozilla.org/security/advisories/mfsa2026-13/#CVE-2026-2800\nhttps://www.mozilla.org/security/advisories/mfsa2026-16/#CVE-2026-2800"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Moderate"}

{"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": "2026-04-15T16:04:12.466630+00:00", "value": {"mitigation_remediation": ["Upgrade Mozilla Firefox for Android and Mozilla Thunderbird to version 148 or later, which contains the fix.", "If an immediate update is not possible, disable or block WebAuthn functionality in the affected browsers until the patch is applied.", "Validate all WebAuthn assertions on the server side, ensuring the origin and user presence flags match expected values to reduce reliance on the browser\u2019s authentication."], "summary": {"action": "Immediate Patch", "impact": "Authentication Spoofing via WebAuthn"}, "threat_synthesis": {"affected_systems": "Affected products include Mozilla Firefox for Android and Mozilla Thunderbird, any version prior to 148. Both browsers incorporate the vulnerable WebAuthn implementation.", "description_and_impact": "The CVE description states that the WebAuthn component in Firefox for Android and Thunderbird allows spoofing of credentials, permitting an attacker to impersonate legitimate users. This undermines authentication processes and can lead to unauthorized access to accounts and services.", "risk_and_exploitability": "The CVSS score of 9.8 signals a critical severity. The EPSS score of less than 1% indicates a low probability of exploitation today. The vulnerability is not listed in the CISA KEV catalog. The CVE does not specify the precise attack vector; any discussion of how an attacker might exploit the flaw is an inference rather than a statement from the CVE data."}}}}, "created": "2026-02-25T11:39:10.867887+00:00", "updated": "2026-04-15T17:00:07.093094+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$thunderbird"]}