CVE-2026-6775
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
Incorrect boundary conditions exist in the WebRTC component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Risk Assessment
Incorrect boundary conditions may lead to unexpected application behavior, potentially allowing an attacker to destabilize the browser or mail client.
Recommendation
Update Firefox and Thunderbird to version 150 or later.
Other vulnerabilities in WebRTC
See all- CVE-2026-8094Critical
An unspecified vulnerability was found in the WebRTC component of Firefox and Thunderbird. The flaw was fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2.
- CVE-2026-2757Critical
A vulnerability in the WebRTC: Audio/Video component of Firefox and Thunderbird due to incorrect boundary conditions. The flaw is fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
- CVE-2026-6753High
Incorrect boundary conditions were found in the WebRTC component of Firefox and Thunderbird, potentially leading to unexpected behavior. The vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
- CVE-2026-6752High
A vulnerability in the WebRTC component of Firefox and Thunderbird is caused by incorrect boundary conditions. The flaw was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
- CVE-2026-6747High
A use-after-free vulnerability was found in the WebRTC component of Firefox and Thunderbird. The flaw was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Original NVD description (English source)
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS