CVE-2026-31233Network attack vector

Remote code execution via manifest post-install script

Published May 12, 2026 · Updated May 12, 2026

Code injection in Guardrails AI 0.6.7 and earlier allows remote attackers to execute arbitrary code through a malicious Hub package. The Hub installer trusts the package manifest's post_install path and dynamically executes the referenced script without validating or sanitizing the manifest value. Exploitation requires the attacker to publish a malicious validator package and an operator to install it, after which the script runs with the operator's privileges.

CVSS severity9.8
Critical
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Guardrails AI 0.6.7 and earlier allows remote attackers to execute arbitrary code through a malicious Hub package. The Hub installer trusts the package manifest's post_install path and dynamically executes the referenced script without validating or sanitizing the manifest value. Exploitation requires the attacker to publish a malicious validator package and an operator to install it, after which the script runs with the operator's privileges.

The record

CVE
CVE-2026-31233
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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