CVE-2026-8973
Modified Modified - Updated After Analysis
Memory Corruption Vulnerabilities in Firefox

Publication date: 2026-05-19

Last updated on: 2026-05-26

Assigner: Mozilla Corporation

Description
Memory safety bugs present in Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
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Meta Information
Published
2026-05-19
Last Modified
2026-05-26
Generated
2026-06-10
AI Q&A
2026-05-19
EPSS Evaluated
2026-06-08
NVD
CVE-2026-8973
EUVD
EUVD-2026-30923
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 151.0.0 (exc)
mozilla thunderbird to 151.0.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Executive Summary

This vulnerability involves memory safety bugs found in Firefox version 150. Some of these bugs showed signs of memory corruption, which means that they could potentially be exploited by attackers to execute arbitrary code on the affected system. The issue was addressed and fixed in Firefox version 151.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run arbitrary code on your system through Firefox 150. This could lead to unauthorized actions such as installing malware, stealing data, or taking control of your device.

Mitigation Strategies

The vulnerability in Firefox 150 was fixed in Firefox 151. To mitigate this vulnerability, you should update your Firefox browser to version 151 or later.

Compliance Impact

The provided information does not specify how the memory safety bugs in Thunderbird 150, identified as CVE-2026-8973, affect compliance with common standards and regulations such as GDPR or HIPAA.

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