Red Hat Security Advisory: thunderbird security update
Multiple security vulnerabilities affecting Mozilla Thunderbird have been addressed in a Red Hat security advisory. These include memory safety bugs, use-after-free, JIT miscompilation, sandbox escape, privilege escalation, and same-origin policy bypass issues. The fixes are included in Thunderbird ESR 140.6 and Thunderbird 146 versions. The advisory rates the impact as important and addresses 10 distinct CVEs related to Firefox and Thunderbird components.
AI Analysis
Technical Summary
Red Hat issued a security advisory (RHSA-2026:0024) for Mozilla Thunderbird, addressing multiple vulnerabilities shared with Firefox components. The vulnerabilities include memory safety bugs (CVE-2025-14333), use-after-free in the WebRTC signaling component (CVE-2025-14321), JIT miscompilation in the JavaScript engine (CVE-2025-14324, CVE-2025-14325, CVE-2025-14330), sandbox escape via incorrect boundary conditions in the CanvasWebGL graphics component (CVE-2025-14322), privilege escalations in the Netmonitor and DOM Notifications components (CVE-2025-14323, CVE-2025-14328, CVE-2025-14329), and a same-origin policy bypass in the request handling component (CVE-2025-14331). These issues are fixed in Thunderbird ESR 140.6 and Thunderbird 146. The advisory is rated as important by Red Hat Product Security.
Potential Impact
The vulnerabilities collectively could allow attackers to execute arbitrary code, escalate privileges, bypass security policies such as same-origin, and escape sandbox restrictions within the Thunderbird mail client. These impacts could compromise the confidentiality, integrity, and security of the affected system. However, no known exploits in the wild have been reported at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages (ESR 140.6 and 146) that fix these vulnerabilities. Users of Red Hat Enterprise Linux 8.2 Advanced Update Support should apply the Thunderbird update as described in the Red Hat advisory RHSA-2026:0024. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation actions are indicated beyond applying the official update.
Red Hat Security Advisory: thunderbird security update
Description
Multiple security vulnerabilities affecting Mozilla Thunderbird have been addressed in a Red Hat security advisory. These include memory safety bugs, use-after-free, JIT miscompilation, sandbox escape, privilege escalation, and same-origin policy bypass issues. The fixes are included in Thunderbird ESR 140.6 and Thunderbird 146 versions. The advisory rates the impact as important and addresses 10 distinct CVEs related to Firefox and Thunderbird components.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat issued a security advisory (RHSA-2026:0024) for Mozilla Thunderbird, addressing multiple vulnerabilities shared with Firefox components. The vulnerabilities include memory safety bugs (CVE-2025-14333), use-after-free in the WebRTC signaling component (CVE-2025-14321), JIT miscompilation in the JavaScript engine (CVE-2025-14324, CVE-2025-14325, CVE-2025-14330), sandbox escape via incorrect boundary conditions in the CanvasWebGL graphics component (CVE-2025-14322), privilege escalations in the Netmonitor and DOM Notifications components (CVE-2025-14323, CVE-2025-14328, CVE-2025-14329), and a same-origin policy bypass in the request handling component (CVE-2025-14331). These issues are fixed in Thunderbird ESR 140.6 and Thunderbird 146. The advisory is rated as important by Red Hat Product Security.
Potential Impact
The vulnerabilities collectively could allow attackers to execute arbitrary code, escalate privileges, bypass security policies such as same-origin, and escape sandbox restrictions within the Thunderbird mail client. These impacts could compromise the confidentiality, integrity, and security of the affected system. However, no known exploits in the wild have been reported at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages (ESR 140.6 and 146) that fix these vulnerabilities. Users of Red Hat Enterprise Linux 8.2 Advanced Update Support should apply the Thunderbird update as described in the Red Hat advisory RHSA-2026:0024. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation actions are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:0024
- Cve Count
- 10
- Additional Cves
- ["CVE-2025-14322","CVE-2025-14323","CVE-2025-14324","CVE-2025-14325","CVE-2025-14328","CVE-2025-14329","CVE-2025-14330","CVE-2025-14331","CVE-2025-14333"]
Threat ID: 6a4049de27e9c7971983142e
Added to database: 06/27/2026, 22:08:30 UTC
Last enriched: 06/27/2026, 22:25:24 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 8
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