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Back to active CVEs
High · CVSS 7.5CVE-2026-62367GHSA-XV7Q-FVMC-JX96

Vikunja: OIDC email-fallback account linking ignores email_verified, enabling local-account takeoverCVE-2026-62367

Answer in brief

CVE-2026-62367 records a High severity (CVSS 7.5) vulnerability in Vikunja: OIDC email-fallback account linking ignores email_verified, enabling local-account takeover. The current sources do not mark it as known exploited. The current feed maps go-vikunja/vikunja (generic), code.vikunja.io/api (go), code.vikunja.io/api (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 9, 2026Updated Oct 9, 2026Source checked Oct 9, 2026First seen by HOL Oct 9, 2026Material review Oct 9, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps go-vikunja/vikunja (generic), code.vikunja.io/api (go), code.vikunja.io/api (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
go-vikunja/vikunjageneric>=1.0.0 <2.4.02.4.0
code.vikunja.io/apigo>=1.0.0,<=2.3.02.4.0
code.vikunja.io/apigo>=1.0.0 <2.4.02.4.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for go-vikunja/vikunja, code.vikunja.io/api, code.vikunja.io/api.
  2. 2Review the reported fix. Update go-vikunja/vikunja to 2.4.0; code.vikunja.io/api to 2.4.0; code.vikunja.io/api to 2.4.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 9, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Vikunja: Scoped API token can mint unrestricted OAuth session credentialsSame go-vikunja/vikunja package
  • Vikunja: Plaintext storage of password-reset/email-confirm tokens in database enables account takeover on DB read accessSame go-vikunja/vikunja package
  • Jexactyl: Stripe checkout confirmation accepts mismatched-currency/amount payments as full payment (payment forgery)Also CWE-345
  • MariaDB: `qc_info` plugin can do OOB reads if query contains \0Same generic ecosystem
  • MariaDB: mysql_json plugin OOB readsSame generic ecosystem
  • MariaDB: environment injection via wsrep bootstrap in the mariadb.service fileSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-287, CWE-290, CWE-345
Source
CVE List V5
Source checked
Oct 9, 2026
References
5 linked sources
Open source record