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Vulnerabilities

Vulnerability · CVE-2025-61928

Better Auth is an authentication and authorization library for TypeScript.

Published Oct 9, 2025 · catalog updated Oct 10, 2025 · Better Auth is an

Last checked Oct 25, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2025-61928 is not in CISA KEV. FIRST estimates a 18.84% chance of exploitation in the next 30 days. Check whether you run Better Auth is an.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Better Auth is an).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
18.84%
Remediation
Version ranges on file
Affected products
vendor better-auth better-auth < 1.3.26

Better Auth is an authentication and authorization library for TypeScript. In versions prior to 1.3.26, unauthenticated attackers can create or modify API keys for any user by passing that user's id in the request body to the route. . When no session exists but is present in the request body, becomes false and the user object is set to the attacker-controlled ID. Server-only field validation only executes when is true (lines 280-295), allowing attackers to set privileged fields. No additional authentication occurs before the database operation, so the malicious payload is accepted. The same pa

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor better-auth better-auth < 1.3.26< 1.3.26

How to fix CVE-2025-61928

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-61928 is not in CISA KEV. FIRST estimates a 18.84% chance of exploitation in the next 30 days. Check whether you run Better Auth is an.

Which versions are affected?

Compare what you have installed with better-auth better-auth < 1.3.26 < 1.3.26. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 18.84%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 9, 2025 · EUVD

    Detected

    Better Auth is an authentication and authorization library for TypeScript. In versions prior to 1.3.26, unauthenticated attackers can create or modify API keys for any user by passing that user's id in the request body to the route. . When no session exists but is present in the request body, becomes false and the user object is set to the attacker-controlled ID. Server-only field validation only

  2. Oct 10, 2025 · EUVD

    Updated

    Better Auth is an authentication and authorization library for TypeScript. In versions prior to 1.3.26, unauthenticated attackers can create or modify API keys for any user by passing that user's id in the request body to the route. . When no session exists but is present in the request body, becomes false and the user object is set to the attacker-controlled ID. Server-only field validation only

Sources

  • CVE.orgVulnerability recordCVE-2025-61928

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-61928

    30-day exploitation probability 18.84%

    first.org
  • EUVDVulnerability recordEUVD-2025-33660

    Better Auth is an authentication and authorization library for TypeScript. In versions prior to 1.3.26, unauthenticated attackers can create or modify API keys for any user by passing that user's id in the request body to the route. . When no session exists but is present in the

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 25, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 25, 2026
  • CVE.orgOct 23, 2026
  • EUVDOct 23, 2026