CVE-2026-55107: elct9620 kobako · Code Injection
Affects elct9620 kobakoSource CVE Database V5
Not known to be exploited · CVSS 10.0 Critical : upgrade to 0.9.1 as a priority.
Data as of 14 Nov 2026, 20:44 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 57% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 30 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.
What to do
Upgrade elct9620 kobako to 0.9.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| elct9620kobako | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade Kobako to version 0.9.1 or later, where this vulnerability has been patched. No other mitigation is necessary as the fix fully addresses the issue.
Description
Kobako is a Ruby gem embedding a Wasm-isolated mruby interpreter to safely execute untrusted Ruby scripts. Versions from 0.1.0 up to but not including 0.9.1 contain a vulnerability allowing guest scripts to escape the sandbox and execute arbitrary Ruby code in the host process. This vulnerability is identified as CVE-2026-55107 and has been patched in version 0.9.1.