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Vulnerability record · CVE-2026-82466 · published 29 August 2026

CVE-2026-82466: Improper authentication vulnerability

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.

9.4 CVSS 4.0 Critical EPSS 0.61% · top 52.7% CWE-287 · Improper authentication Deferred
9.4CVSS 4.0 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
11 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/jeremyevans/rodauth
https://github.com/jeremyevans/rodauth/commit/35d74a9f07b2005a8ea75fc11a6539c04f3c2840
https://github.com/jeremyevans/rodauth/security/advisories/GHSA-3pvr-v35r-4r75
https://www.vulncheck.com/advisories/rodauth-before-2.46.0-authentication-bypass-via-webauthn-login

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Source: NIST National Vulnerability Database (record CVE-2026-82466), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.