CVE-2026-57490Public exploitNetwork attack vectorHinoki check available

MFA bypass via password-only WebDAV authentication

Published Oct 14, 2026 · Updated Oct 14, 2026

TOTP bypass in error311 FileRise before 3.16.0 allows remote authenticated users to access files through WebDAV without a second factor. The public/webdav.php Basic authentication callback treats AuthModel::authenticate() success as sufficient and discards the returned TOTP state instead of enforcing verification. Exploitation requires administrator-enabled WebDAV and valid credentials for a TOTP-enabled account; file reading, modification, and deletion remain bounded by that account's WebDAV permissions.

CVSS severity8.1
High
EPSS probability0.41%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

TOTP bypass in error311 FileRise before 3.16.0 allows remote authenticated users to access files through WebDAV without a second factor. The public/webdav.php Basic authentication callback treats AuthModel::authenticate() success as sufficient and discards the returned TOTP state instead of enforcing verification. Exploitation requires administrator-enabled WebDAV and valid credentials for a TOTP-enabled account; file reading, modification, and deletion remain bounded by that account's WebDAV permissions.

The record

CVE
CVE-2026-57490
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
error311
Product
FileRise
Classifications
CWE-308, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 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=< 3.16.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

error311 · FileRiseversion=< 3.16.0

Published CVSS scores

8.1error311CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-308Use of Single-factor Authentication
T1078Valid Accounts

Public exploit references

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Technologies

Your stack

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