CVE-2026-12307
Description
A memory safety bug in Firefox 152 and Firefox ESR 140.12 could lead to arbitrary code execution, fixed in the respective updates.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A memory safety bug in Firefox 152 and Firefox ESR 140.12 could lead to arbitrary code execution, fixed in the respective updates.
Vulnerability
A memory safety bug was present in Firefox prior to version 152 and Firefox ESR prior to version 140.12. The exact component is not disclosed in the available references, but the bug could be triggered by processing malicious content. [1][2]
Exploitation
An attacker could exploit this vulnerability by crafting a web page or other content that triggers the memory safety issue. No authentication or special network position is required beyond the ability to serve content to the victim's browser. [1][2]
Impact
Successful exploitation could lead to arbitrary code execution in the context of the browser process, potentially allowing an attacker to compromise the user's system. The impact is rated high by Mozilla. [1][2]
Mitigation
The vulnerability is fixed in Firefox 152 and Firefox ESR 140.12, released on June 16, 2026. Users should update to these versions or later. 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
2Patches
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
0No linked articles in our index yet.