Quick answers
- Is CVE-2026-84306 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-84306 being exploited in the wild.
- How severe is CVE-2026-84306?
- Medium severity, with a CVSS score of 6.5, published 1 September 2026.
- Which products and versions are affected?
- Filament 4.0.0 to 4.12.5, 5.0.0 to 5.7.5; filament/filament (Packagist) ECOSYSTEM:introduced=4.0.0,fixed=4.12.6.
- Is there a fix for CVE-2026-84306?
- Yes. filament/filament (Packagist): upgrade to 4.12.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-84306 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-84306?
- Check whether you run Filament or filament/filament (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- filament/filament (Packagist): upgrade to 4.12.6 or later
composer require filament/filament:^4.12.6
Technical details
This vulnerability exists in Filament's app-based MFA implementation (CWE-294: Authentication Bypass by Capture-replay). The vulnerable component fails to properly invalidate previously issued one-time codes after a newer code from the same time window has been successfully authenticated. While duplicate submission of the exact same code was already blocked, any other code generated within the acceptance window remained valid. An attacker who obtains a user's password and intercepts or gains knowledge of a single TOTP code can replay that code to authenticate as the victim user for up to four minutes (default settings), even after the legitimate user has already used a subsequent code to log in. The attack requires prior compromise of both password and a single code, but no user interaction. Patches are available in Filament 4.12.6 and 5.7.6.
Affected products
- Filament Filament 4.0.0 to 4.12.5, 5.0.0 to 5.7.5
Identifiers
- CVE-2026-84306
- GHSA-r3j6-gpjw-qfjr
Timeline
- 2026-08-17: disclosed: Vulnerability published by GitHub Advisory Database
- 2026-08-17: patched: Patches released in Filament 4.12.6 and 5.7.6
- 2026-09-01: advisory: Advisory updated in GitHub Advisory Database