cucumber_json_schemaRubyGems
Advisory published Updated
cucumber_json_schema is a confirmed malicious RubyGems package (MAL-2026-906) that executes malicious code on install (malicious version 90002.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in cucumber_json_schema (RubyGems)
What this malware does
The OpenSSF Package Analysis project identified 'cucumber_json_schema' @ 90002.0 (rubygems) as malicious.
It is considered malicious because:
- The package communicates with a domain associated with malicious activity.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for cucumber_json_schema (version 90002.0).
If you installed it — respond
Remove cucumber_json_schema from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If cucumber_json_schema was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Credits
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks cucumber_json_schema-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.