What’s Vulnerable › Vulnerabilities

CVE-2022-1212: Use-After-Free in str_escape in mruby/mruby in mruby/mruby

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-04-05 · updated 2026-06-17
• Weakness: CWE-416

Description

Use-After-Free in str_escape in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Affected products

• mruby/mruby: through 3.0.0; 3.1.0-rc, 3.1.0-rc2

References

• https://github.com/mruby/mruby/commit/3cf291f72224715942beaf8553e42ba8891ab3c6
• https://huntr.dev/bounties/9fcc06d0-08e4-49c8-afda-2cae40946abe
• https://github.com/mruby/mruby/commit/3cf291f72224715942beaf8553e42ba8891ab3c6
• https://huntr.dev/bounties/9fcc06d0-08e4-49c8-afda-2cae40946abe

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