CVE-2026-39924
Description
Flarum before 1.8.16 contains an improper session invalidation vulnerability that allows attackers who hold a valid session token to retain full account access after a victim changes their password, because the access_tokens table is never cleared on password change events. The TokensClearer::clearPasswordTokens() function only removes rows from the password_tokens table while leaving all active session cookies and API bearer tokens intact, including long-lived RememberAccessToken entries, and administrator-forced password resets via the user update endpoint are equally ineffective at revoking attacker-held sessions.
How to fix
- Flarum Flarum Framework1.8.16 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Flarum Flarum Framework | v < 1.8.16 | 1.8.16 |
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