CVE-2026-12298
Description
Memory safety bug in Firefox before 152 and Firefox ESR before 140.12 could allow arbitrary code execution.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Memory safety bug in Firefox before 152 and Firefox ESR before 140.12 could allow arbitrary code execution.
Vulnerability
A memory safety bug exists in Firefox versions prior to 152 and Firefox ESR versions prior to 140.12. The bug is triggered when processing specially crafted web content, leading to memory corruption. This vulnerability is fixed in Firefox 152 and Firefox ESR 140.12 [1][2].
Exploitation
An attacker can exploit this vulnerability by convincing a user to visit a malicious website or open a crafted HTML document. No additional privileges are required; the attacker only needs to deliver the crafted content to the target user [1][2].
Impact
Successful exploitation could result in arbitrary code execution in the context of the Firefox process, leading to potential system compromise. This includes the possibility of data theft, installation of malware, or further exploitation [1][2].
Mitigation
Users should update to Firefox 152 or Firefox ESR 140.12, which were released on June 16, 2026, to address this vulnerability. No workarounds are available [1][2].
AI Insight generated on Jun 16, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Range: <152
- Range: <152
Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
5News mentions
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