CVE-2026-82466Network attack vectorHinoki check available

Account takeover via session account fallback

Published Aug 29, 2026 · Updated Aug 29, 2026

Authentication bypass in Rodauth before 2.46.0 allows remote authenticated users to take over arbitrary accounts through webauthn_login. The webauthn_account_id method used super || account_id, allowing a credential lookup miss to fall back to the current session account identifier instead of binding the credential to the requested account. Exploitation requires the non-default webauthn_login feature and an already_logged_in configuration that does not halt or redirect.

CVSS severity9.4
Critical
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Rodauth before 2.46.0 allows remote authenticated users to take over arbitrary accounts through webauthn_login. The webauthn_account_id method used super || account_id, allowing a credential lookup miss to fall back to the current session account identifier instead of binding the credential to the requested account. Exploitation requires the non-default webauthn_login feature and an already_logged_in configuration that does not halt or redirect.

The record

CVE
CVE-2026-82466
Published
Aug 29, 2026
Updated
Aug 29, 2026
Vendor
Jeremy Evans
Product
Rodauth
Classifications
CWE-843, CWE-287, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.46.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jeremy Evans · Rodauthversion=0 <2.46.0

Published CVSS scores

8.7VulnCheck CNACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
9.4VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
CWE-287Improper Authentication
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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