Is CVE-2026-31233 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-31233 being exploited in the wild.

How severe is CVE-2026-31233?

Critical severity, with a CVSS score of 9.8, published 12 May 2026.

Which products and versions are affected?

Guardrails AI <= 0.6.7, up to and including 0.6.7; guardrails-ai (PyPI) ECOSYSTEM:introduced=0,last_affected=0.6.7.

Is there a fix for CVE-2026-31233?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-31233 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-31233?

Check whether you run Guardrails AI or guardrails-ai (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-31233: Guardrails AI code injection in Hub package installation

Q: Which products and versions are affected?

Guardrails AI <= 0.6.7, up to and including 0.6.7; guardrails-ai (PyPI) ECOSYSTEM:introduced=0,last_affected=0.6.7.

Q: Is there a fix for CVE-2026-31233?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-31233 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-31233?

Check whether you run Guardrails AI or guardrails-ai (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-31233 · Severity: critical · CVSS 9.8 · Published 2026-05-12

Guardrails AI, a tool used to ensure safety and reliability in Large Language Model (LLM) outputs, contains a critical security flaw in its package installation system. An attacker could publish a malicious package to the Guardrails Hub that, when installed by a user, automatically runs harmful code on the user's computer. This could lead to a total system takeover, theft of sensitive data, or disruption of business operations.

Technologies: guardrails-ai (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-31233 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-31233 being exploited in the wild.
How severe is CVE-2026-31233?: Critical severity, with a CVSS score of 9.8, published 12 May 2026.
Which products and versions are affected?: Guardrails AI <= 0.6.7, up to and including 0.6.7; guardrails-ai (PyPI) ECOSYSTEM:introduced=0,last_affected=0.6.7.
Is there a fix for CVE-2026-31233?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-31233 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-31233?: Check whether you run Guardrails AI or guardrails-ai (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A code injection vulnerability (CWE-94) exists in the Guardrails AI Hub package installation mechanism. When a user executes the 'guardrails hub install' command, the system fetches a manifest from the Hub and dynamically executes a script defined in the 'post_install' field. Because the script path is constructed from untrusted manifest data without sufficient validation or sanitization, an attacker who successfully publishes a malicious package to the Hub can achieve remote code execution (RCE) on the victim's machine. The vulnerability is present in versions up to and including 0.6.7; as of the advisory date, no patched version is specified.

Affected products

Guardrails AI guardrails-ai <= 0.6.7

Identifiers

CVE-2026-31233
GHSA-r6hf-g5x6-7pv9
PYSEC-2026-347

Timeline

2026-05-12: disclosed
2026-05-12: advisory: Published to GitHub Advisory Database and NVD
2026-05-27: other: Advisory updated and reviewed by GitHub

References

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