CVE-2026-8090
Use-after-free in Firefox DOM Networking
Publication date: 2026-05-07
Last updated on: 2026-05-07
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | 150.0.2 |
| mozilla | firefox_esr | 140.10.2 |
| mozilla | firefox_esr | 115.35.2 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a use-after-free issue in the DOM networking component of Mozilla Firefox. A use-after-free vulnerability occurs when a program continues to use a pointer after the memory it points to has been freed, which can lead to unexpected behavior or security risks.
This specific vulnerability was addressed and fixed in Firefox versions 150.0.2, Firefox ESR 140.10.2, and Firefox ESR 115.35.2.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this use-after-free vulnerability in the DOM Networking component, you should update your Firefox browser to version 150.0.2 or later, or if you are using Firefox ESR, update to ESR 140.10.2 or ESR 115.35.2 or later.
How can this vulnerability impact me? :
CVE-2026-8090 is a use-after-free vulnerability in the DOM: Networking component of Firefox. Such vulnerabilities can lead to memory corruption, which attackers might exploit to execute arbitrary code on the affected system.
This means that if exploited, an attacker could potentially take control of your browser or system, leading to unauthorized actions or data compromise.
The issue was fixed in Firefox versions 150.0.2, Firefox ESR 140.10.2, and Firefox ESR 115.35.2, so using these or later versions mitigates the risk.