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firefox

Multiple security vulnerabilities have been identified and fixed in Mozilla Thunderbird, including sandbox escapes, information disclosure, memory safety bugs, denial-of-service, privilege escalation, mitigation bypasses, and boundary condition errors. These issues affect Thunderbird ESR 140.12 and related Firefox versions. Red Hat has released security updates for Thunderbird in Red Hat Enterprise Linux 9.6 Extended Update Support to address these vulnerabilities.

CVE-2026-12289 is a privilege escalation vulnerability in the Graphics: WebRender component of Firefox and Thunderbird products. It was fixed in Firefox 152, Firefox ESR 140.12, and Thunderbird 140.12 and 152. The vulnerability allows an attacker to escalate privileges, potentially compromising system security. The Mozilla advisories note that while exploitation via email in Thunderbird is mitigated by disabled scripting, the vulnerability remains a risk in browser or browser-like environments. This issue is part of a broader set of high-impact security fixes addressing memory safety bugs, sandbox escapes, and other vulnerabilities in these products. The CVSS vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability.

Detailed information about Red Hat Security Advisory: firefox security update affecting Red Hat Product Security Red Hat. Get real-time updates, technical detai

Vulnerability in Mozilla Firefox (CVE-2026-12289) - Live Threat Intelligence - Threat Radar | OffSeq.com

Vulnerability in Mozilla Firefox (CVE-2026-12289)

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