What is CVE-2026-45758?

CVE-2026-45758 is a critical-severity vulnerability in Guardrails-ai Guardrails, classified under CWE-506. CVSS score: 9.6/10. Published 2026-06-05.

How severe is CVE-2026-45758?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Guardrails-ai Guardrails

CVE-2026-45758

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==…

EPSS: 0.003 (19.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Guardrails-ai Guardrails — versions = 0.10.1
Guardrailsai Guardrails_ai — versions 0.10.1

Weakness classification (CWE)

CWE-506

References

security-advisories@github.com (x_refsource_MISC, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Issue Tracking)
security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-45758?: CVE-2026-45758 is a critical-severity vulnerability in Guardrails-ai Guardrails, classified under CWE-506. CVSS score: 9.6/10. Published 2026-06-05.
How severe is CVE-2026-45758?: Critical severity. CVSS v3 base score is 9.6 out of 10.