Red Hat Security Advisory: thunderbird security update
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1 (CVE-2026-7323) * firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Audio/Video component (CVE-2026-7320) * firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 (CVE-2026-7322) * firefox: thunderbird: webrtc: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-7321) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
This advisory covers several vulnerabilities in Mozilla Thunderbird as packaged in Red Hat Enterprise Linux 10. The issues include memory safety bugs (CVE-2026-7322, CVE-2026-7323), an information disclosure vulnerability caused by incorrect boundary conditions in the Audio/Video component (CVE-2026-7320), and a sandbox escape vulnerability due to incorrect boundary conditions in the WebRTC networking component (CVE-2026-7321). These vulnerabilities were fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1. The update is provided by Red Hat as part of their security advisory RHSA-2026:19153.
Potential Impact
The vulnerabilities could lead to memory safety issues, information disclosure, and sandbox escape within the Thunderbird mail client. These issues may allow attackers to access sensitive information or execute code outside the intended sandbox environment. Red Hat rates the security impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released an updated Thunderbird package (version 140.10.1-1.el10_2) that addresses these vulnerabilities. Users of Red Hat Enterprise Linux 10 should apply this security update promptly. Detailed update instructions are available in the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigations are indicated beyond applying the official update.
Red Hat Security Advisory: thunderbird security update
Description
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1 (CVE-2026-7323) * firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Audio/Video component (CVE-2026-7320) * firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 (CVE-2026-7322) * firefox: thunderbird: webrtc: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-7321) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
pkg:rpm/redhat/thunderbirdRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers several vulnerabilities in Mozilla Thunderbird as packaged in Red Hat Enterprise Linux 10. The issues include memory safety bugs (CVE-2026-7322, CVE-2026-7323), an information disclosure vulnerability caused by incorrect boundary conditions in the Audio/Video component (CVE-2026-7320), and a sandbox escape vulnerability due to incorrect boundary conditions in the WebRTC networking component (CVE-2026-7321). These vulnerabilities were fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1. The update is provided by Red Hat as part of their security advisory RHSA-2026:19153.
Potential Impact
The vulnerabilities could lead to memory safety issues, information disclosure, and sandbox escape within the Thunderbird mail client. These issues may allow attackers to access sensitive information or execute code outside the intended sandbox environment. Red Hat rates the security impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released an updated Thunderbird package (version 140.10.1-1.el10_2) that addresses these vulnerabilities. Users of Red Hat Enterprise Linux 10 should apply this security update promptly. Detailed update instructions are available in the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigations 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-2026:20586
- Cve Count
- 4
- Additional Cves
- ["CVE-2026-7321","CVE-2026-7322","CVE-2026-7323"]
- Cvss Version
- null
Threat ID: 6a16097ce29bf47b5064904d
Added to database: 05/26/2026, 20:58:36 UTC
Last enriched: 06/28/2026, 00:30:03 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 61
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