Vulnerability · Published Aug 29, 2026 · Assigned by VulnCheck

CVE-2026-82466Rodauth before 2.46.0 Authentication Bypass via webauthn_login

High 8.7

In plain English

A high-severity improper authentication in rodauth from jeremyevans. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.7High

Exploit odds (30 days)0.6%top 50.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Rodauth before 2.46.0 contains an authentication bypass vulnerability in the webauthn_login route that allows logged-in users to authenticate as any other account. Attackers can exploit improper account resolution logic that falls back to session account identifiers instead of validating the credential binding to complete authentication as arbitrary users.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:14	ruby-rodauth	2.46.0-1	DEBIAN-CVE-2026-82466
Ubuntu:26.10	ruby-rodauth	no fix listed	UBUNTU-CVE-2026-82466

Affected products (as reported)

Vendor	Product	Versions
jeremyevans	rodauth	0 – before 2.46.0

Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

References

Patch Commit patch
GitHub Security Advisory (GHSA-3pvr-v35r-4r75) vendor-advisory
https://github.com/jeremyevans/rodauth product
VulnCheck Advisory: Rodauth before 2.46.0 Authentication Bypass via webauthn_login third-party-advisory