CVE-2026-6767
Memory Corruption Vulnerability in NSS Libraries Affecting Firefox
Publication date: 2026-04-21
Last updated on: 2026-04-22
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 150.0 (exc) |
| mozilla | firefox | to 115.35.0 (exc) |
| mozilla | firefox | From 140.0 (inc) to 140.10.0 (exc) |
| mozilla | thunderbird | From 140.0 (inc) to 140.10.0 (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
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update Firefox to version 150 or later, or update Firefox ESR to versions 115.35 or 140.10 or later where the issue has been fixed.
Can you explain this vulnerability to me?
This vulnerability is an unspecified issue in the Libraries component of NSS (Network Security Services) used by Mozilla Firefox. It was addressed and fixed in Firefox version 150, Firefox ESR 115.35, and Firefox ESR 140.10.
How can this vulnerability impact me? :
The specific impact of this vulnerability is not detailed in the provided information. However, since it affects the NSS Libraries component, it could potentially impact the security of cryptographic operations within Firefox.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
There is no information available regarding the effect of this vulnerability on compliance with standards such as GDPR or HIPAA.