CVE-2026-45758: Guardrails AI is a Python framework that helps build AI applications

Q: How do I fix CVE-2026-45758?

guardrails ai: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2026-45758 being exploited?

CVE-2026-45758 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-45758 affect?

CVE-2026-45758 affects guardrails ai. Severity is critical (CVSS 9.6). Guardrails AI is a Python framework that helps build AI applications. On May 11, 2026 at approximately 6:00 PM Pacific, an attacker published a malicious version of `guardrails-ai` (0.10.1) to PyPI. Aany user who installed `guardrails-ai==0

Q: How urgent is CVE-2026-45758?

Priority 39/100. Critical severity

This month

CRITICAL 9.6DOWNGRADE

CVE-2026-45758 is a critical-severity flaw (CVSS 9.6) affecting guardrails ai. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Guardrails AI is a Python framework that helps build AI applications. On May 11, 2026 at approximately 6:00 PM Pacific, an attacker published a malicious version of `guardrails-ai` (0.10.1) to PyPI. Aany user who installed `guardrails-ai==0.10.1` from PyPI on May 11, 2026 may be affected. Security researchers identified the malicious package within approximately 2 hours of publication, and PyPI quarantined the repository. Based on our telemetry,

Why this priority

Critical severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-506
Published	2026-06-05
Last modified	2026-07-23

Publisher (CNA): GitHub, Inc. · Vendor: guardrailsai

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-05 20:17 UTCPublished CVE record published
2026-07-23 07:10 UTCUpdated Record last modified

guardrailsai guardrails ai DOWNGRADE

Affected: 0.10.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.10.1

1. Check installed version

pip show guardrails-ai

2. No fixed release: DOWNGRADE to a release before 0.10.1

pip index versions guardrails-ai pip install "guardrails-ai<0.10.1"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-45758?

guardrails ai: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-45758 being exploited?

CVE-2026-45758 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-45758 affect?

CVE-2026-45758 affects guardrails ai. Severity is critical (CVSS 9.6). Guardrails AI is a Python framework that helps build AI applications. On May 11, 2026 at approximately 6:00 PM Pacific, an attacker published a malicious version of `guardrails-ai` (0.10.1) to PyPI. Aany user who installed `guardrails-ai==0

How urgent is CVE-2026-45758?

Priority 39/100. Critical severity

Software pages

Python vulnerabilities · PyPI packages vulnerabilities

References

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