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CVE-2026-6784 is a collection of memory safety bugs affecting Mozilla Firefox 149 and Mozilla Thunderbird 149. Mozilla indicated that some of the underlying flaws showed evidence of memory corruption and assessed that, with sufficient effort, some could potentially be exploited for arbitrary code execution. The available information does not identify the specific vulnerable functions or components, but the issue class is consistent with memory corruption arising from unsafe memory handling in browser or mail client code paths. The vulnerabilities were fixed in Firefox 150 and Thunderbird 150.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.