Malicious Firefox extensions

Firefox users

Malicious Firefox extensions impersonate Phantom, Jupiter, and Bitget wallets to steal recovery phrases and private keys.

Do this now

Read the report and check whether Firefox users affects you.

First seen: 27 Oct 2026
Last update: 27 Oct 2026, 20:18 UTC
Source: news

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Malicious Firefox extensions
Severity: unknown. Patch status: fix status unknown.
Affected: Firefox users

Malicious Firefox extensions impersonate Phantom, Jupiter, and Bitget wallets to steal recovery phrases and private keys.

## Steps
1. Search the repo, its CI and infra config for Firefox users. If present, report the version in use and whether it's affected.
2. No source names a fix yet; check the vendor advisory. Until one ships: restrict network access to it.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://socket.dev/blog/firefox-wallet-impersonators?utm_medium=feed
https://pwned.coffee/i/malicious-firefox-extensions

Receipt

Exploitation: No known exploitation
Score: No CVSS published yet: severity unknown.
Last checked: 27 Oct 2026, 20:18 UTC

Sources: KEV – CVE record – Vendor –

Sources

socket.dev: Malicious Firefox Extensions Impersonate Phantom, Jupiter, and Bitget to Steal Wallet Secrets

Wrong fix version, or a source we missed? Send it back to chef@pwned.coffee with the source, and we'll correct it here.

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