CVE-2026-91982

Medium

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.

SeverityMedium

CVSS4.3

Exploit probability—

ProductCode.vikunja.io/api

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-522CWE-522

How to fix

Update

code.vikunja.io/api2.6.0 or later

Vendor advisories

github.com/go-vikunja/vikunja/security/advisories/GHSA-88f6-4rjv-x774

Affected products

Product	Affected versions	Fixed in
code.vikunja.io/apiGo	v < 2.6.0, No range specified	2.6.0

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