CVE-2021-47784
High
Description
Cyberfox Web Browser 52.9.1 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the search bar with excessive data. Attackers can generate a 9,000,000 byte payload and paste it into the search bar to trigger an application crash.
SeverityHigh
CVSS7.5
Exploit probability—
ProductCyberfox Web Browser
PublishedJan 15, 2026
First seenJan 15, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Cyberfox Cyberfox Web Browser | 52.9.1 (Possibly all versions) | — |
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