Vulnerability in Go-Vikunja Vikunja
CVE-2026-91982
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (28.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-88f6-4rjv-x774 (vendor-advisory)
- www.vulncheck.com/advisories/vikunja-before-2.6.0-totp-secret-disclosure-via-api (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91982?
- CVE-2026-91982 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Insufficiently Protected Credentials. CVSS score: 4.3/10. Published 2026-09-15.
- How severe is CVE-2026-91982?
- Medium severity. CVSS v3 base score is 4.3 out of 10.