Security Vulnerabilities fixed in Firefox 152 — Mozilla

Memory safety bugs present in Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11,...

Security Vulnerabilities fixed in Thunderbird 140.12 — Mozilla

Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. Memory safety bugs present in...

Oracle Linux 7 : firefox (ELSA-2026-19704)

The remote Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-19704 advisory. - Update to 140.10.0 ESR Orabug: 39499844CVE-2026-6746CVE-2026-6747 CVE-2026-6748CVE-2026-6749CVE-2026-6750CVE-2026-6751CVE-2026-6752...

RHEL 9 : thunderbird (RHSA-2026:26269)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:26269 advisory. Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fixes: firefox: Incorrect boundary conditions in the JavaScript...

RHEL 8 : thunderbird (RHSA-2026:26268)

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:26268 advisory. Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fixes: firefox: Incorrect boundary conditions in the JavaScript...

PT-2026-49691

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description A clickjacking issue exists in the Widget: Gtk component. Clickjacking is a technique where an attacker tricks a user into clicking something different from what the...

PT-2026-49695

Name of the Vulnerable Software and Affected Versions Firefox version 151 Thunderbird version 151 Description Memory safety bugs exist that exhibit evidence of memory corruption. These issues could potentially be exploited to execute arbitrary code. Recommendations Update Firefox to version 152...

PT-2026-49672

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description Information disclosure occurs in the Graphics: WebGPU component due to incorrect boundary conditions. Recommendations Update Firefox to version 152. Update Thunderbird...

PT-2026-49670

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashes when handling memory operations. Recommendations Update to version 152 f...

PT-2026-49686

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashes when handling memory operations. Recommendations Update to version 152...

PT-2026-49692

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description A spoofing issue exists within the DOM: Core & HTML component...

PT-2026-49685

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description A mitigation bypass exists within the DOM security component...

CVE-2026-12297: Improper Restriction of Operations within the Bounds of a Memory Buffer

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12...

PT-2026-49674

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashe...

CVE-2026-12328: Buffer Copy without Checking Size of Input

Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This...

PT-2026-49659

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Firefox ESR versions prior to 115.37 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists in the software, which could...

PT-2026-49699

Name of the Vulnerable Software and Affected Versions Firefox ESR versions prior to 140.12 Firefox ESR versions prior to 115.37 Thunderbird versions prior to 140.12 Description Incorrect boundary conditions exist within the Internationalization component. Recommendations Update to version 140.12...

PT-2026-49675

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashe...

PT-2026-49683

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists that could lead to unexpected behavior or crashes. Recommendations...

PT-2026-49684

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A mitigation bypass exists within the DOM security component...