Mozilla: >> Thunderbird >> 153.3.1 Security Vulnerabilities
Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
9.1
EPSS Score
0.004
Published
2026-09-15
Spoofing issue due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
9.1
EPSS Score
0.005
Published
2026-09-15
Incorrect boundary conditions in the DOM: Animation component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
9.8
EPSS Score
0.006
Published
2026-09-15
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
8.8
EPSS Score
0.004
Published
2026-09-15
Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
9.1
EPSS Score
0.003
Published
2026-09-15
Incorrect boundary conditions in the Networking: HTTP component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
9.8
EPSS Score
0.006
Published
2026-09-15
Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
CVSS Score
9.8
EPSS Score
0.006
Published
2026-09-01
Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
CVSS Score
6.5
EPSS Score
0.004
Published
2026-09-01
Incorrect boundary conditions in the Layout: Grid component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
CVSS Score
4.3
EPSS Score
0.003
Published
2026-09-01
Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
CVSS Score
8.8
EPSS Score
0.004
Published
2026-09-01