Firefox 152 Memory Safety Bugs Causing Arbitrary Code Exec
CVE-2026-16411 Published on July 21, 2026
Memory safety bugs fixed in Thunderbird 153
Memory safety bugs present in Thunderbird 152. 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 153 and Thunderbird 153.
Vulnerability Analysis
CVE-2026-16411 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2026-16411 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-16411
stack.watch emails you whenever new vulnerabilities are published in Mozilla Firefox or Mozilla Thunderbird. Just hit a watch button to start following.
Affected Versions
Mozilla Firefox:- Version 153, <= * is unaffected.
- Version 153, <= * is unaffected.