What’s Vulnerable › Vulnerabilities

CVE-2022-1286: heap-buffer-overflow in mrb_vm_exec in mruby/mruby in mruby/mruby

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-04-10 · updated 2026-06-17
• Weakness: CWE-122

Description

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Affected products

• mruby/mruby: before 3.2 — fixed in 3.2

How to fix

Upgrade to a fixed version: mruby/mruby 3.2. Check the vendor advisory for mitigations.

References

• https://github.com/mruby/mruby/commit/b1d0296a937fe278239bdfac840a3fd0e93b3ee9
• https://huntr.dev/bounties/f918376e-b488-4113-963d-ffe8716e4189
• https://github.com/mruby/mruby/commit/b1d0296a937fe278239bdfac840a3fd0e93b3ee9
• https://huntr.dev/bounties/f918376e-b488-4113-963d-ffe8716e4189

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