CVE-2026-34727

Name: CVE-2026-34727
Creator: NVD / NIST
Published: 2026-04-10T16:16:31.853+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2026-34727 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the OIDC callback handler issues a full JWT token without checking whether the matched user has TOTP two-factor authentication enabled. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the OIDC callback handler issues a full JWT token without checking whether the matched user has TOTP two-factor authentication enabled. When a local user with TOTP enrolled is matched via the OIDC email fallback mechanism, the second factor is completely skipped. This vulnerability is fixed in 2.3.0.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

0.28%

19.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Vikunja	Vikunja	< 2.3.0

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cgExploit, Vendor Advisory
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cgExploit, Vendor Advisory

Timeline

Published: Apr 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-34727?

How severe is CVE-2026-34727?

CVE-2026-34727 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2026-34727?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34727?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST