cheesebox (RubyGems) · Malicious Code
Affects cheeseboxSource GCVE Database
Malicious package : remove cheesebox and rotate any secrets on hosts that installed it.
Data as of 12 Nov 2026, 17:35 UTC
Malicious package
Published to RubyGems · OSV MAL-2026-19157
What to do
Remove cheesebox from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| RubyGemscheesebox | Affected
| Fixed in– |
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Description
The cheesebox RubyGem version 10.0.1 contains malicious code that executes automatically during installation. The malicious script reads sensitive system files and host identifiers, then sends this data over a TLS connection to an attacker-controlled server. This behavior is unrelated to the gem's intended functionality and represents a data exfiltration threat.