CVE-2026-45758: Guardrails ai Malicious Code Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xmpw-2vmm-p4p6",
  "modified" : "2026-06-09T13:13:18Z",
  "published" : "2026-05-19T15:40:44Z",
  "aliases" : [ "CVE-2026-45758" ],
  "summary" : "Malicious code in guardrails-ai 0.10.1 (supply chain compromise)",
  "details" : "### Impact\n\nOn May 11, 2026 at approximately 6:00 PM Pacific, an attacker published a malicious version of `guardrails-ai` (0.10.1) to PyPI.\n\n**Affected:** any user who installed `guardrails-ai==0.10.1` from PyPI on May 11, 2026.\n\nSecurity researchers identified the malicious package within approximately 2 hours of publication, and PyPI quarantined the repository. Based on our telemetry, we have observed no requests to Guardrails AI infrastructure originating from the malicious 0.10.1 version, and a review of system and access logs has produced no evidence of user data exfiltration through our systems.\n\nFor the full timeline, technical details, and remediation steps we have taken, see [SECURITY_ADVISORY.md](https://github.com/guardrails-ai/guardrails/blob/main/SECURITY_ADVISORY.md).\n\n### Patches\n\nNo patched version above 0.10.1 is available yet. **Downgrade to `0.10.0`**, which is unaffected.\n\n### Workarounds\n\n**1. Pin to a safe version:**\n\n`guardrails-ai==0.10.0`\n\n**2. While the PyPI quarantine is active, install from GitHub:**\n\n`pip install git+https://github.com/guardrails-ai/guardrails.git@v0.10.0`\n\nThe `v0.10.0` tag in this repository is clean. Track quarantine status here: [#1473](https://github.com/guardrails-ai/guardrails/issues/1473).\n\n**3. If you installed 0.10.1, treat the host as potentially compromised.** Rotate any credentials accessible from that machine (GitHub PATs, cloud provider keys, package registry tokens, API keys) and audit your GitHub account for unauthorized workflows or repositories.\n\n**4. Snowglobe and Guardrails Hub users :** all Snowglobe and Guardrails Hub API keys will be invalidated at 2:00 PM Pacific on May 13, 2026. Rotate yours before then to avoid service interruption.\n\n### References\n\n- Full advisory, timeline, and remediation details: [SECURITY_ADVISORY.md](https://github.com/guardrails-ai/guardrails/blob/main/SECURITY_ADVISORY.md)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "guardrails-ai"
    },
    "versions" : [ "0.10.1" ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/guardrails-ai/guardrails/security/advisories/GHSA-xmpw-2vmm-p4p6"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-45758"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/guardrails-ai/guardrails/issues/1473"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/guardrails-ai/guardrails"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/guardrails-ai/guardrails/blob/main/SECURITY_ADVISORY.md"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/guardrails-ai/PYSEC-2026-206.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-506" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-19T15:40:44Z",
    "nvd_published_at" : "2026-06-05T20:17:32Z"
  }
}