---
title: "CVE-2026-62367: Vikunja - Authentication Bypass"
description: "Vikunja 1.0.0 through 2.3.0 contains an authentication bypass caused by linking SSO login to local accounts using unverified email claims in OpenID Connect provider, letting attackers log in as victims without consent, exploit requires attacker to obtain a valid token with victim's email."
url: https://panop.io/threat-heartbeat/CVE-2026-62367/
---

# CVE-2026-62367 Vikunja - Authentication Bypass

Vikunja 1.0.0 through 2.3.0 contains an authentication bypass caused by linking SSO login to local accounts using unverified email claims in OpenID Connect provider, letting attackers log in as victims without consent, exploit requires attacker to obtain a valid token with victim's email.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.09% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-62367)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

9 October 2026

Updated

15 October 2026

Weakness

[CWE-287](https://cwe.mitre.org/data/definitions/287.html)

## Vendor fix

Upgrade to version 2.4.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-62367](https://nvd.nist.gov/vuln/detail/CVE-2026-62367)
- [https://github.com/go-vikunja/vikunja/commit/7854f2729ab72000210b61c25929678fd6901630](https://github.com/go-vikunja/vikunja/commit/7854f2729ab72000210b61c25929678fd6901630)
- [https://github.com/go-vikunja/vikunja/releases/tag/v2.4.0](https://github.com/go-vikunja/vikunja/releases/tag/v2.4.0)
- [https://github.com/go-vikunja/vikunja/security/advisories/GHSA-xv7q-fvmc-jx96](https://github.com/go-vikunja/vikunja/security/advisories/GHSA-xv7q-fvmc-jx96)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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