Kobako Vulnerable to Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service)
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| elct9620 | kobako | affected |
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| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Elct9620 | Kobako |
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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-7pwq-q9jf-539h | kobako Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service) |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.799% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Elct9620
Elct9620 kobako |
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| Vendors & Products |
Elct9620
Elct9620 kobako |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Kobako is a Ruby gem that embeds a Wasm-isolated mruby interpreter inside applications, allowing execution of untrusted Ruby scripts (LLM-generated code, user formulas, student submissions, third-party plugins) in-process without giving them access to host memory, files, network, or credentials. From version 0.1.0 to before version 0.9.1, a guest mruby script running inside the Kobako sandbox can execute arbitrary Ruby in the host process, fully escaping the sandbox. This issue has been patched in version 0.9.1. | |
| Title | Kobako Vulnerable to Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service) | |
| Weaknesses | CWE-470 CWE-94 |
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| References |
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| Metrics |
cvssV3_1
|