CRITICALRubyGems

kobako Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service)

kobako Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service)

CVE-2026-55107Published 1 week agoUpdated 1 week agoSource: OSV

Affected packages

  • kobako0.1.0 → 0.9.1

Exploit signal

Known exploited (CISA KEV)
No
EPSS score
EPSS percentile

EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.

kobako Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service) | HackTribune