CVE-2022-1212

Use-After-Free in str_escape in mruby/mruby in GitHub repository mruby ...

Published 5 Apr 2022Modified 17 Jun 2026CWE 416

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD.

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 packages and fixed versions

Source	Package	Fixed in
debian 10	mruby	no fix listed
debian 11	mruby	no fix listed
debian 12	mruby	3.0.0-4
debian 13	mruby	3.0.0-4
debian 14	mruby	3.0.0-4
echo	mruby	3.0.0-4
rapidfort ubuntu 20.04	mruby	0:3.2.0-2
rapidfort ubuntu 22.04	mruby	0:3.2.0-2
rapidfort ubuntu 24.04	mruby	0:3.2.0-2

References

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FindsEvery admitted image is rescanned every 24 hours by default (scan.rescanInterval). When Trivy rates this vulnerability critical for the image's package source, it appears in the image's findings by name. Findings without a fix are left out unless includeUnfixed is on.
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RefusesWith a policy that blocks critical findings, a pod with this image is refused at admission, a rollback to it included. Pods already running are not evicted.
RecordsEach decision is recorded with the policy that ran and its hash, then sealed under a signed checkpoint.

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.