SB2026063083 - Remote code execution in Mozilla Firefox
Published: June 30, 2026
Security Bulletin ID
SB2026063083
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2026-14241)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code on the target system.
Remediation
Install update from vendor's website.
References
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-62/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2043241
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2045514
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2045576
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2045623
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2045765
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2049409
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2049840