CVE-2026-41427 Vulnerability Analysis & Exploit Details

CVE-2026-41427
Vulnerability Scoring

6.5
/10
High Risk

If left unpatched, CVE-2026-41427 could lead to major system disruptions or data loss.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-41427 Details

Status: Analyzed

Last updated: 🕢 13 May 2026, 19:36 UTC
Originally published on: 🕗 24 Apr 2026, 20:16 UTC

Time between publication and last update: 18 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVE-2026-41427 Vulnerability Summary

CVE-2026-41427: Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.5, the clientPrivileges option documents a create action, but the OAuth client creation endpoints did not invoke the hook before persisting new clients. Deployments that configured clientPrivileges to restrict client registration were not actually restricted — any authenticated user could reach the create endpoints and register an OAuth client with attacker-chosen redirect URIs and metadata. This vulnerability is fixed in 1.6.5.

Assessing the Risk of CVE-2026-41427

Access Complexity Graph

The exploitability of CVE-2026-41427 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-41427

CVE-2026-41427 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-41427, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-41427, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2026-41427 has no significant impact on data confidentiality.
  • Integrity: High
    CVE-2026-41427 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: None
    CVE-2026-41427 does not impact system availability.

CVE-2026-41427 References

External References

CWE Common Weakness Enumeration

CWE-863

Vulnerable Configurations

  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.9:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.9:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.10:-:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.10:-:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.10:beta1:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.10:beta1:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.11:-:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.11:-:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.11:beta1:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.11:beta1:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.11:beta2:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.11:beta2:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.12:-:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.12:-:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.12:beta1:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.12:beta1:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.12:beta2:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.12:beta2:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.13:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.13:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.14:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.14:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.15:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.15:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.16:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.16:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.17:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.17:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.18:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.18:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.19:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.19:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.20:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.20:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.21:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.21:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.22:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.22:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:-:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:-:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta1:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta1:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta2:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta2:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta3:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta3:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta4:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta4:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta5:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta5:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta6:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta6:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta7:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta7:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta8:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta8:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta9:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta9:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta10:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta10:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta11:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta11:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta12:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta12:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta13:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta13:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta15:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta15:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta16:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta16:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta17:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta17:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta18:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta18:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta19:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta19:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta20:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.0:beta20:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.1:-:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.1:-:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.1:beta1:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.1:beta1:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.1:beta2:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.1:beta2:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.1:beta3:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.1:beta3:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.2:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.2:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.3:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.3:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.4:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.4:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.5:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.5:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.6:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.6:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.7:beta1:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.5.7:beta1:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.0:-:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.0:-:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.0:beta0:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.0:beta0:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.1:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.1:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.2:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.2:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.3:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.3:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.4:*:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.6.4:*:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.8:-:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.8:-:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.8:beta7:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.4.8:beta7:*:*:*:node.js:*:*
  • cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.7.0:beta0:*:*:*:node.js:*:*
    cpe:2.3:a:better-auth:better-auth\/oauth-provider:1.7.0:beta0:*:*:*:node.js:*:*

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