CVE-2026-2757
Received Received - Intake
Boundary Error in Firefox WebRTC Audio/Video Component

Publication date: 2026-02-24

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
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Meta Information
Published
2026-02-24
Last Modified
2026-04-13
Generated
2026-06-16
AI Q&A
2026-02-24
EPSS Evaluated
2026-06-15
NVD
CVE-2026-2757
Affected Vendors & Products
Showing 5 associated CPEs
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
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KEV
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CWE ID Description
CWE-1384 The product does not properly handle unexpected physical or environmental conditions that occur naturally or are artificially induced.
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Executive Summary

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.

Impact Analysis

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.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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.

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