vulnerability · Fri 09 Oct 2026 · 20:49 UTC
GHSA-xv7q-fvmc-jx96: Vikunja: OIDC email-fallback account linking ignores email_verified, enabling local-account takeover
Filed UTCSource GTH ↗
With the per-provider OIDC emailfallback option enabled, Vikunja links an SSO login to a pre-existing local (username+password) account using only the email claim — no email_verified (or Microsoft xms_edov) check and no password check, on the unauthenticated callback. An attacker who can make the configured issuer emit a token bearing a victim's email logs in as that victim with a full session and no victim interaction (the nOAuth / Grafana CVE-2023-3128 class). …
Signals
as the pipeline stamped them- High
- High-risk vulnerability
CVE
KEV from CISA · EPSS from FIRST| Id | KEV | EPSS | Reference |
|---|---|---|---|
| CVE-2026-62367 | — | 0.09% | NVD ↗ |
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