5.3

CVE-2026-91982: go-vikunja vikunja Insufficiently Protected Credentials

CVSS: 5.3v4.0MediumDeferred
AliasesGHSA-88f6-4rjv-x774GO-2026-6722
Published 15-09-2026Last modified 17-09-2026
Open JSON

Vulnerability summary

CVE-2026-91982 is a medium (CVSS 5.3) Insufficiently Protected Credentials vulnerability in go-vikunja vikunja. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 26.8% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.35%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-09-2026
    PublishedVulnerability first disclosed.
  2. 17-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 3 sources · 2 versions

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.07 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Code.vikunja.io1 product
  • api< 2.6.0 | All versions (No fix recorded)
Go-vikunja1 product

2 vendors · 2 products

References

6 links