CVE-2026-114614 (GCVE-0-2026-114614)

Vulnerability from cvelistv5 – Published: 2026-10-22 21:00 – Updated: 2026-10-22 21:00
VLAI
Title
Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback hosts
Summary
Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0, authlib.common.security.is_secure_transport() uses a textual prefix comparison for loopback HTTP exemptions, so a URL whose userinfo begins with a loopback host can be accepted even when its parsed host is an external non-loopback system. An external party able to supply a URL to OIDC RP-Initiated Logout registration, authorization-server metadata validation, or another call site can bypass the TLS-required guard and cause cleartext redirection or acceptance of cleartext endpoints. The issue does not bypass redirect URI exact matching and does not by itself forge tokens or authenticate users. The vulnerable authlib.common.security.is_secure_transport() implementation in authlib/common/security.py misinterprets the userinfo component before OIDC RP-Initiated Logout dynamic client registration and other consumers enforce transport security. This issue is fixed in version 1.8.0.
Severity
2.6 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
  • CWE-693 - Protection Mechanism Failure
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7668 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
authlib authlib Affected: < 1.8.0
guessed Create a notification for this product.
Show details on NVD website
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        }
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      "providerMetadata": {
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        "discovery": "UNKNOWN"
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      "title": "Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback hosts"
    }
  },
  "cveMetadata": {
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    "cveId": "CVE-2026-114614",
    "datePublished": "2026-10-22T21:00:14.354Z",
    "dateReserved": "2026-10-21T20:34:25.599Z",
    "dateUpdated": "2026-10-22T21:00:14.354Z",
    "state": "PUBLISHED"
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                "versions": [
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        "descriptions": [
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          }
        ],
        "id": "CVE-2026-114614",
        "lastModified": "2026-10-22T21:17:16.683",
        "metrics": {
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            "url": "https://github.com/authlib/authlib/commit/95ad1f90acf0c7b9cf2a8f25e6eb3f1135b8dc70"
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          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/authlib/authlib/releases/tag/v1.8.0"
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        "vulnStatus": "Received",
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-23T00:38:47+00:00",
      "cve": "CVE-2026-114614",
      "id": "CVE-2026-114614",
      "initial_release_date": "2026-10-22T21:00:14.354000+00:00",
      "product_status:known_affected": "11",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "authlib: Authlib: Transport security bypass via improper URL validation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-114614.json",
      "version": "3"
    }
  }
}



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