CVE-2026-8954
Incorrect Boundary Conditions and Integer Overflow in Firefox Audio/Video Component
Publication date: 2026-05-19
Last updated on: 2026-05-19
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 151.0.0 (exc) |
| mozilla | firefox | to 140.11.0 (exc) |
| mozilla | thunderbird | to 140.11 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
This vulnerability involves incorrect boundary conditions and an integer overflow in the Audio/Video component of Firefox. It has a CVSS v3.1 base score of 7.5, indicating a high severity. The impact is a high confidentiality impact (C:H) with no impact on integrity or availability. This means an attacker could potentially access or leak sensitive information without user interaction or privileges.
Can you explain this vulnerability to me?
This vulnerability involves incorrect boundary conditions and an integer overflow in the Audio/Video component of Mozilla Firefox.
An integer overflow occurs when an arithmetic operation attempts to create a numeric value that is outside the range that can be represented with a given number of bits, potentially leading to unexpected behavior.
Incorrect boundary conditions mean that the software does not properly check or enforce limits on data sizes or values, which can be exploited.
This issue was fixed in Firefox version 151 and Firefox ESR 140.11.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update Firefox to version 151 or later, or Firefox ESR to version 140.11 or later, where the issue has been fixed.