CVE-2026-91982 - Vikunja before 2.6.0 TOTP Secret Disclosure via API

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MEDIUM

Vikunja before 2.6.0 TOTP Secret Disclosure via API

Published Sep 15, 2026

5.3

MEDIUM

CVSS 4.0

EPSS 0.35%

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

Vendor GO-Vikunja Product Vikunja Default
unaffected
- Version
  0
  Status
  affected
  Constraints
  <2.6.0
- Version
  2.6.0
  Status
  unaffected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

GO-Vikunja

Vikunja

unaffected

Version	Status	Constraints
0	affected	<2.6.0
2.6.0	unaffected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-522

Insufficiently Protected Credentials

References (3)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-78653
Advisory
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-88f6-4rjv-x774
exploitvendor-advisory
https://www.vulncheck.com/advisories/vikunja-before-2.6.0-totp-secret-disclosure-via-api
third-party-advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-78653		Advisory
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-88f6-4rjv-x774		exploitvendor-advisory
https://www.vulncheck.com/advisories/vikunja-before-2.6.0-totp-secret-disclosure-via-api		third-party-advisory