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CVE-2026-45758 guardrails-ai CVE debrief

CVE-2026-45758 is a critical vulnerability in Guardrails AI, a Python framework for building 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. Any 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 telemetry, Guardrails AI maintainers observed no requests to Guardrails AI infrastructure originating from the malicious 0.10.1 version, and a review of system and access logs produced no evidence of user data exfiltration through their systems. Users should upgrade to version 0.10.2 or downgrade to version 0.10.0, both of which are unaffected. Those who installed version 0.10.1 should rotate any credentials accessible from their machine (GitHub PATs, cloud provider keys, package registry tokens, API keys) and audit their GitHub account for unauthorized workflows or repositories.

Vendor
guardrails-ai
Product
guardrails
CVSS
CRITICAL 9.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-07-23
Advisory published
2026-06-05
Advisory updated
2026-07-23

Who should care

Users who installed `guardrails-ai==0.10.1` from PyPI on May 11, 2026, should be aware of this vulnerability and take necessary actions to secure their systems.

Technical summary

A malicious version of `guardrails-ai` (0.10.1) was published to PyPI on May 11, 2026. The package was identified as malicious within 2 hours, and PyPI quarantined the repository. The vulnerability has a CVSS score of 9.6 and is classified as CRITICAL.

Defensive priority

high

Recommended defensive actions

  • Upgrade to version 0.10.2 or downgrade to version 0.10.0
  • Rotate any credentials accessible from the machine (GitHub PATs, cloud provider keys, package registry tokens, API keys)
  • Audit GitHub account for unauthorized workflows or repositories

Evidence notes

The CVE-2026-45758 vulnerability was published on June 5, 2026, and modified on June 8, 2026. The vulnerability affects Guardrails AI version 0.10.1.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45758 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45758

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45758 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45758

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.