Mozilla: >> Firefox >> 129 Security Vulnerabilities
Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.
CVSS Score
6.5
EPSS Score
0.002
Published
2026-05-19
Memory safety bugs present in Firefox 150.0.1. 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 vulnerability was fixed in Firefox 150.0.2 and Thunderbird 150.0.2.
CVSS Score
8.1
EPSS Score
0.003
Published
2026-05-07
Undefined behavior in the Audio/Video component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
CVSS Score
9.1
EPSS Score
0.003
Published
2026-03-24
Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
CVSS Score
6.5
EPSS Score
0.002
Published
2026-03-24
Undefined behavior in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
CVSS Score
8.1
EPSS Score
0.003
Published
2026-03-24
Heap buffer overflow in the Audio/Video: Playback component in Firefox for Android. This vulnerability was fixed in Firefox 148.0.2.
CVSS Score
8.8
EPSS Score
0.004
Published
2026-03-10
Malicious scripts could cause desynchronization between the address bar and web content before a response is received in Firefox iOS, allowing attacker-controlled pages to be presented under spoofed domains. This vulnerability was fixed in Firefox for iOS 147.4.
CVSS Score
9.8
EPSS Score
0.003
Published
2026-02-24
Malicious scripts that interrupt new tab page loading could cause desynchronization between the address bar and page content, allowing the attacker to spoof arbitrary HTML under a trusted domain. This vulnerability was fixed in Firefox for iOS 147.2.1.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-02-16
Unicode RTLO characters could allow malicious websites to spoof filenames in the downloads UI for Firefox for iOS, potentially tricking users into saving files of an unexpected file type. This vulnerability was fixed in Firefox for iOS 144.0.
CVSS Score
6.5
EPSS Score
0.002
Published
2025-12-18
When switching between Android apps using the card carousel Firefox shows a black screen as its card image when a password-related screen was the last one being used. Prior to Firefox 144 the password edit screen was visible. This vulnerability was fixed in Firefox 144.
CVSS Score
9.1
EPSS Score
0.003
Published
2025-10-14