CVE-2023-34416
CWE-787Published: June 19, 2023· Updated: Jun 17, 2026
Official Description
Memory safety bugs present in Firefox 113, Firefox ESR 102.11, and Thunderbird 102.12. 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 affects Firefox ESR < 102.12, Firefox < 114, and Thunderbird < 102.12.
Risk Analysis
Memory safety bugs in Firefox, Firefox ESR, and Thunderbird could allow for arbitrary code execution through memory corruption. These critical flaws require urgent patching to prevent potential exploitation by remote attackers.
The vulnerability is remotely exploitable with low complexity, but there is no known public exploit.
Update Firefox to 114+, Firefox ESR to 102.12+, and Thunderbird to 102.12+.
Technical Analysis
CVE-2023-34416 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (12)
Quick Facts
Related CVEs (CWE-787)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-34416 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts