# CVE-2026-91982

## Summary

- **CVE ID:** CVE-2026-91982
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-522
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 17, 2026

## Description

Vikunja before 2.6.0 continues to expose the raw TOTP shared secret after enrollment through the GET /api/v1/user/settings/totp and /api/v1/user/settings/totp/qrcode endpoints without re-authentication. Attackers with a valid access token can read the secret, import it into their own authenticator, and generate valid codes indefinitely to defeat the second factor and enable account takeover.

## Affected Products

- go-vikunja — vikunja (0)
- go-vikunja — vikunja (2.6.0)

## References

- [CNA](https://github.com/go-vikunja/vikunja/security/advisories/GHSA-88f6-4rjv-x774)
- [CNA](https://www.vulncheck.com/advisories/vikunja-before-2.6.0-totp-secret-disclosure-via-api)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.28%
- **EPSS Percentile:** 20.3

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._