Improper Authentication Affecting code.vikunja.io/api/pkg/modules/auth/openid package, versions <2.3.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-CODEVIKUNJAIOAPIPKGMODULESAUTHOPENID-16321511
- published2 May 2026
- disclosed10 Apr 2026
- creditaisafe.io
Introduced: 10 Apr 2026
CVE-2026-34727 Â (opens in a new tab)How to fix?
Upgrade code.vikunja.io/api/pkg/modules/auth/openid to version 2.3.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Authentication in the OIDC login process when the EmailFallback mechanism is enabled. An attacker can gain unauthorized access to accounts protected by TOTP by authenticating to the OIDC provider with a matching email address, thereby bypassing the second-factor authentication challenge.