Authorization Flaw in 2FAuth Affects Account Management
CVE-2026-63437

6.5MEDIUM

Key Information:

Vendor

Bubka

Status
2fauth
Vendor
CVE Published:
6 November 2026

What is CVE-2026-63437?

The vulnerability in 2FAuth's web application allows authenticated users to exploit an authorization oversight in the recipients() method. Prior to version 8.0.0, users could access a list of recipients associated with others' Two-Factor Authentication accounts without proper authorization checks, leading to possible enumeration of registered user IDs, display names, and targeted email addresses. This could have significant privacy implications for affected users. The issue was resolved in version 8.0.0.

Affected Version(s)

2FAuth < 8.0.0

References

https://github.com/Bubka/2FAuth/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/Bubka/2FAuth/commit/08753afbd847da8fa2...
x_refsource_MISC
https://github.com/Bubka/2FAuth/releases/tag/v8.0.0
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.