CVE-2026-84306Network attack vectorHinoki check available

Account access via stale TOTP replay

Published Sep 1, 2026 · Updated Sep 1, 2026

Authentication bypass in Filament 4.0.0 through 4.12.5 and 5.0.0 through 5.7.5 allows remote attackers to access accounts. AppAuthentication::verifyCode() keys its accepted-timestep cache by both the secret and submitted code, so each distinct TOTP retains separate replay state. Exploitation requires the target's password, one app-generated code, and enabled app-based MFA; email-based MFA is unaffected.

CVSS severity6.5
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Filament 4.0.0 through 4.12.5 and 5.0.0 through 5.7.5 allows remote attackers to access accounts. AppAuthentication::verifyCode() keys its accepted-timestep cache by both the secret and submitted code, so each distinct TOTP retains separate replay state. Exploitation requires the target's password, one app-generated code, and enabled app-based MFA; email-based MFA is unaffected.

The record

CVE
CVE-2026-84306
Published
Sep 1, 2026
Updated
Sep 1, 2026
Vendor
Filament
Product
Filament
Classifications
CWE-294, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 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=>= 4.0.0, < 4.12.6
  2. Affected versionversion=>= 5.0.0, < 5.7.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Filament · Filamentversion=>= 4.0.0, < 4.12.6; version=>= 5.0.0, < 5.7.6

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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