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CVE-2025-14330 is a JIT miscompilation vulnerability in Mozilla's JavaScript Engine. The issue affects Firefox before 146, Firefox ESR before 140.6, Thunderbird before 146, and Thunderbird before 140.6. The provided content identifies the vulnerable area only at the component level as the JavaScript Engine JIT and does not include the specific function or code path. As a JIT miscompilation flaw, crafted JavaScript can cause the engine to generate incorrect machine code or make invalid optimization assumptions, which can undermine memory safety and browser security guarantees. Mozilla lists this issue among a set of high-impact browser vulnerabilities that may contribute to arbitrary code execution scenarios.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A just-in-time (JIT) miscompilation vulnerability in the JavaScript Engine of Mozilla products, potentially leading to arbitrary code execution.
A JIT miscompilation vulnerability in the JavaScript Engine: JIT component of Firefox ESR, which could potentially lead to code execution or other unexpected behavior.
A JIT miscompilation vulnerability in the JavaScript Engine: JIT component of Firefox, which could potentially lead to code execution or other unexpected behavior.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.