CVE-2026-16361
Memory safety bugs fixed in Firefox ESR 115.38 and Firefox ESR 140.13
Description
Memory safety bugs present in Firefox ESR 115.37 and Firefox ESR 140.12. 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 ESR 115.38 and Firefox ESR 140.13.
INFO
Published Date :
July 21, 2026, 1:17 p.m.
Last Modified :
July 21, 2026, 1:17 p.m.
Remotely Exploit :
No
Source :
[email protected]
Solution
- Update Firefox ESR to version 115.38 or later.
- Update Firefox ESR to version 140.13 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-16361.
| URL | Resource |
|---|---|
| https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518 | |
| https://www.mozilla.org/security/advisories/mfsa2026-69/ | |
| https://www.mozilla.org/security/advisories/mfsa2026-70/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-16361 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-16361
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-16361 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-16361 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Mozilla', 'product': 'Firefox', 'versions': [{'status': 'unaffected', 'version': '115.38', 'versionType': 'rpm', 'lessThanOrEqual': '115.*'}, {'status': 'unaffected', 'version': '140.13', 'versionType': 'rpm', 'lessThanOrEqual': '*'}]}] Added Description Memory safety bugs present in Firefox ESR 115.37 and Firefox ESR 140.12. 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 ESR 115.38 and Firefox ESR 140.13. Added Reference https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518 Added Reference https://www.mozilla.org/security/advisories/mfsa2026-69/ Added Reference https://www.mozilla.org/security/advisories/mfsa2026-70/