Mozilla: >> Firefox >> 140.10.0 Security Vulnerabilities
Links in a sandboxed iframe could open an external app on Android without the required "allow-" permission. This vulnerability was fixed in Firefox 144 and Thunderbird 144.
CVSS Score
6.5
EPSS Score
0.002
Published
2025-10-14
Sandbox escape due to integer overflow in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143.0.3.
CVSS Score
8.6
EPSS Score
0.003
Published
2025-09-30
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 143.0.3.
CVSS Score
7.5
EPSS Score
0.002
Published
2025-09-30
Spoofing issue in the Site Permissions component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
CVSS Score
8.1
EPSS Score
0.003
Published
2025-09-16
Information disclosure, mitigation bypass in the Privacy component in Firefox for Android. This vulnerability was fixed in Firefox 143.
CVSS Score
7.5
EPSS Score
0.003
Published
2025-09-16
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
CVSS Score
6.5
EPSS Score
0.003
Published
2025-09-16
Mitigation bypass in the Web Compatibility: Tooling component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
CVSS Score
5.4
EPSS Score
0.003
Published
2025-09-16
The HTTP/2 protocol does not consider the role of the TCP congestion window in providing information about content length, which makes it easier for remote attackers to obtain cleartext data by leveraging a web-browser configuration in which third-party cookies are sent, aka a "HEIST" attack.
CVSS Score
5.3
EPSS Score
0.14
Published
2016-09-06
The HTTPS protocol does not consider the role of the TCP congestion window in providing information about content length, which makes it easier for remote attackers to obtain cleartext data by leveraging a web-browser configuration in which third-party cookies are sent, aka a "HEIST" attack.
CVSS Score
5.3
EPSS Score
0.14
Published
2016-09-06
Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.
CVSS Score
4.3
EPSS Score
0.019
Published
2014-01-26