Critical severity · published Jun 30, 2026
CVE-2026-14241
Memory safety bugs fixed in Firefox 152.0.4
9.8
CVSS
0.4%
EPSS
No
On KEV
Description
Memory safety bugs present in Firefox 152.0.3. 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 152.0.4.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
152.0.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-14241
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-14241
Broken Link
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2043241%2C2045514%2C2045576%2C2045623%2C2045765%2C2049409%2C2049840
Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=2046814
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-62/
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