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Vulnerability record · CVE-2026-31233 · published 12 May 2026

CVE-2026-31233: Code injection vulnerability

Guardrails AI thru 0.6.7 contains a code injection vulnerability (CWE-94) in its Hub package installation mechanism. When installing validator packages via guardrails hub install, the system retrieves a manifest from the Guardrails Hub and dynamically executes a script specified in the post_install field. The script path is constructed from untrusted manifest data and executed without proper validation or sanitization, allowing remote code execution. An attacker who can publish malicious packages to the Hub can inject arbitrary code that will be executed on any system where a victim installs the malicious package.

9.8 CVSS 3.1 Critical EPSS 0.93% · top 41.1% CWE-94 · Code injection Deferred
9.8CVSS 3.1 base score
0.93%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Guardrails AI thru 0.6.7 contains a code injection vulnerability (CWE-94) in its Hub package installation mechanism. When installing validator packages via guardrails hub install, the system retrieves a manifest from the Guardrails Hub and dynamically executes a script specified in the post_install field. The script path is constructed from untrusted manifest data and executed without proper validation or sanitization, allowing remote code execution. An attacker who can publish malicious packages to the Hub can inject arbitrary code that will be executed on any system where a victim installs the malicious package.

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

References

LinkTags
https://github.com/guardrails-ai/guardrails
https://www.notion.so/CVE-2026-31233-35d1e13931888142a954fb3f50ee0c94

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Source: NIST National Vulnerability Database (record CVE-2026-31233), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.