CVE-2026-91982 Vikunja before 2.6.0 TOTP Secret Disclosure via API
Attackers with valid tokens can read TOTP secrets via API, enabling indefinite second-factor bypass and account takeover in Vikunja.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-91982?
CVE-2026-91982 is a medium-severity vulnerability in go-vikunja vikunja, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-522
Which versions are affected by CVE-2026-91982?
3 open source packages ship an affected version, including code.vikunja.io/api.
| Package | Affected | Fixed in |
|---|---|---|
code.vikunja.io/api Go | All versions | None |
code.vikunja.io/api Go | All versions | 2.6.0 |
code.vikunja.io/api Go | All versions | 2.6.0 |
How do I fix CVE-2026-91982?
Upgrade code.vikunja.io/api to 2.6.0 or later.
Is CVE-2026-91982 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91982 exists.
Sources
Also known as GHSA-88f6-4rjv-x774, GO-2026-6722.