Disclosure summary
Vikunja is an open-source self-hosted task management platform. In versions 1.0.0 through 2.3.0, when an administrator enables the per-provider `emailfallback` option on an OpenID Connect provider, Vikunja links an SSO login to a pre-existing local (username+password) account using only the `email` claim from the IdP. The fallback never checks an `email_verified` (or Microsoft `xms_edov`) signal and never requires the matched account's password. An attacker who can obtain a token from the configured issuer carrying a victim's email logs in as that victim with a full session, with no consent or interaction from the victim. Version 2.4.0 fixes the issue.
Source-reported weakness categories
CWE-287, CWE-290, CWE-345
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST NVD · NVD-CVE-2026-62367
Open original source · Updated Oct 09, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
GitHub reviewed advisories · GHSA-xv7q-fvmc-jx96
Open original source · Updated Oct 09, 2026
Vikunja: OIDC email-fallback account linking ignores email_verified, enabling local-account takeover
GitHub reviewed package advisory. Version ranges and patches are independently attributed; executable descriptions and source code locations are excluded.
Source severity: HIGH
| Vendor | Product / association | Version / bounds |
|---|---|---|
| go | code.vikunja.io/api | >= 1.0.0, |
Indexed product associations
These cached associations support search and triage. Confirm applicability, platform conditions, and fixed versions in the original record.
| Vendor | Product | Version | Source / relationship |
|---|---|---|---|
| go | code.vikunja.io/api | >= 1.0.0, | GHSA-xv7q-fvmc-jx96 / vendor-listed |
Original records & references
- NIST NVD record
- CVE Program record
- security-advisories@github.com
- security-advisories@github.com
- security-advisories@github.com
Repositories cited by this CVE
The saved CVE record references these repositories. A citation can identify affected software, a fix, or related research; it does not verify exploit code. These citations are separate from automated search matches and local association reviews.
- go-vikunja/vikunja CVE record citation
GitHub repository matches
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No stored repository matches
Repository discovery has not recorded an update for this CVE yet.
Discovery progress
0 of 3 discovery queries finished. GitHub returned 0 indexed results; 0 malformed or disallowed results were rejected.
No discovery update has been recorded for this CVE.
View all 0 stored repository matches
PUBLISHED 2026-10-09T21:17:05+00:00
MODIFIED 2026-10-09T21:17:05+00:00
INGESTED 2026-10-11T00:55:12+00:00