Red Hat Security Advisory: thunderbird security update
A security update for Mozilla Thunderbird addresses multiple vulnerabilities including spoofing, use-after-free, memory safety bugs, sandbox escapes, information disclosure, mitigation bypass, and clickjacking issues. These vulnerabilities affect Thunderbird ESR 140.7 and Thunderbird 147 as packaged for Red Hat Enterprise Linux 9.2. The update fixes 13 CVEs related to Firefox and Thunderbird components, improving overall memory safety and sandbox security.
AI Analysis
Technical Summary
This Red Hat security advisory (RHSA-2026:1415) covers a set of 13 vulnerabilities affecting Mozilla Thunderbird and Firefox components integrated in Thunderbird ESR 140.7 and Thunderbird 147. The issues include spoofing in the Downloads Panel (CVE-2025-14327), multiple use-after-free vulnerabilities in JavaScript GC, IPC, and JavaScript engine components (CVE-2026-0885, CVE-2026-0882, CVE-2026-0884), memory safety bugs (CVE-2026-0891), sandbox escapes due to incorrect boundary conditions and integer overflow in graphics components (CVE-2026-0878, CVE-2026-0879, CVE-2026-0880, CVE-2026-0886), information disclosure in networking and PDF viewer components (CVE-2026-0883, CVE-2026-0887), mitigation bypass in DOM security (CVE-2026-0877), and spoofing and clickjacking issues (CVE-2026-0890). These vulnerabilities are addressed by updated Thunderbird packages provided by Red Hat for Enterprise Linux 9.2.
Potential Impact
The vulnerabilities collectively could allow attackers to perform spoofing, bypass security mitigations, cause use-after-free memory corruption, escape sandbox restrictions, disclose sensitive information, and conduct clickjacking attacks. These issues impact the security and integrity of the Thunderbird mail client and could potentially be leveraged to compromise user data or system security if exploited.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9.2 that address all listed vulnerabilities. Users should apply these official security updates promptly to remediate the issues. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigations are specified beyond applying the vendor-provided patches.
Red Hat Security Advisory: thunderbird security update
Description
A security update for Mozilla Thunderbird addresses multiple vulnerabilities including spoofing, use-after-free, memory safety bugs, sandbox escapes, information disclosure, mitigation bypass, and clickjacking issues. These vulnerabilities affect Thunderbird ESR 140.7 and Thunderbird 147 as packaged for Red Hat Enterprise Linux 9.2. The update fixes 13 CVEs related to Firefox and Thunderbird components, improving overall memory safety and sandbox security.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory (RHSA-2026:1415) covers a set of 13 vulnerabilities affecting Mozilla Thunderbird and Firefox components integrated in Thunderbird ESR 140.7 and Thunderbird 147. The issues include spoofing in the Downloads Panel (CVE-2025-14327), multiple use-after-free vulnerabilities in JavaScript GC, IPC, and JavaScript engine components (CVE-2026-0885, CVE-2026-0882, CVE-2026-0884), memory safety bugs (CVE-2026-0891), sandbox escapes due to incorrect boundary conditions and integer overflow in graphics components (CVE-2026-0878, CVE-2026-0879, CVE-2026-0880, CVE-2026-0886), information disclosure in networking and PDF viewer components (CVE-2026-0883, CVE-2026-0887), mitigation bypass in DOM security (CVE-2026-0877), and spoofing and clickjacking issues (CVE-2026-0890). These vulnerabilities are addressed by updated Thunderbird packages provided by Red Hat for Enterprise Linux 9.2.
Potential Impact
The vulnerabilities collectively could allow attackers to perform spoofing, bypass security mitigations, cause use-after-free memory corruption, escape sandbox restrictions, disclose sensitive information, and conduct clickjacking attacks. These issues impact the security and integrity of the Thunderbird mail client and could potentially be leveraged to compromise user data or system security if exploited.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9.2 that address all listed vulnerabilities. Users should apply these official security updates promptly to remediate the issues. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigations are specified beyond applying the vendor-provided patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:1415
- Cve Count
- 13
- Additional Cves
- ["CVE-2026-0877","CVE-2026-0878","CVE-2026-0879","CVE-2026-0880","CVE-2026-0882","CVE-2026-0883","CVE-2026-0884","CVE-2026-0885","CVE-2026-0886","CVE-2026-0887","CVE-2026-0890","CVE-2026-0891"]
Threat ID: 6a27e9818dd33fbd851680f3
Added to database: 06/09/2026, 10:22:57 UTC
Last enriched: 07/15/2026, 14:56:25 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 60
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