CVE-2026-82466
Authentication bypass in Rodauth webauthn_login enables account impersonation.
Is CVE-2026-82466 being exploited?
Not confirmed. CVE-2026-82466 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2026-82466?
CVE-2026-82466 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-82466?
Yes. A fix has been recorded for CVE-2026-82466. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-82466 affect?
CVE-2026-82466 affects Rodauth < 2.46.0, Ruby web applications using Rodauth with WebAuthn. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-82466?
Upgrade Rodauth to >=2.46.0; revoke sessions and audit for unauthorized access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Logged-in users can authenticate as arbitrary other accounts via webauthn_login fallback, enabling account takeover and data access.
Immediate action required
- affected< 2.46.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.