CVE-2026-123521 Details
Description
Vikunja before 2.7.1 contains an improper restriction of excessive authentication attempts vulnerability that allows session holders to brute-force account passwords via unthrottled re-authentication endpoints. Attackers with a stolen session can guess the password via /user/settings/totp/disable without lockout, then disable TOTP without a code for persistent account takeover.
A vulnerability in Vikunja versions prior to 2.7.1 allows session holders to brute-force account passwords through unthrottled re-authentication endpoints. This improper restriction of excessive authentication attempts enables attackers with a stolen session to guess passwords via the TOTP disable endpoint, disabling two-factor authentication (2FA) and leading to persistent account takeover.
Users are advised to update to Vikunja version 2.7.1 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 8, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/go-vikunja/vikunja/security/advisories/GHSA-49pj-52x6-8gpj | [email protected] | AdvisoryTechnical AnalysisVendor |
| https://www.vulncheck.com/advisories/vikunja-before-2.7.1-password-brute-force-via-totp-disable-endpoint | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-307 | Improper Restriction of Excessive Authentication Attempts | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Vikunja | <= 2.7.0 (semver) |
CPE
Remediation
| |
Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 8, 2026 | New CVE Received | [email protected] |