CVE-2026-2757
Boundary Error in Firefox WebRTC Audio/Video Component
Publication date: 2026-02-24
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | to 148.0 (exc) |
| mozilla | thunderbird | to 148.0 (exc) |
| mozilla | firefox | to 115.33.0 (exc) |
| mozilla | firefox | From 128.0 (inc) to 140.8.0 (exc) |
| mozilla | thunderbird | to 140.8.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-1384 | The product does not properly handle unexpected physical or environmental conditions that occur naturally or are artificially induced. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-2757 is a high-impact security vulnerability found in Firefox versions prior to 148 and Firefox ESR versions prior to 115.33 and 140.8. It involves incorrect boundary conditions in the WebRTC Audio/Video component, meaning that the software improperly handles boundary checks within the WebRTC module responsible for audio and video processing.
This flaw could lead to security issues such as memory corruption or other exploitation risks because the boundary checks are not correctly enforced.
How can this vulnerability impact me? :
The vulnerability could allow attackers to exploit the improper boundary checks in the WebRTC Audio/Video component, potentially causing memory corruption.
Memory corruption can lead to serious security consequences, including arbitrary code execution, crashes, or other unexpected behavior that compromises the security and stability of the affected Firefox browser.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate the CVE-2026-2757 vulnerability, you should update your Firefox or Firefox ESR browser to the fixed versions.
- Upgrade Firefox to version 148 or later.
- Upgrade Firefox ESR to version 115.33 or later.
- Upgrade Firefox ESR to version 140.8 or later.
These updates include patches that fix the incorrect boundary conditions in the WebRTC Audio/Video component, preventing potential memory corruption and exploitation.