CVE-2026-39924Flarum < 1.8.16 Session Persistence via Improper Access Token Revocation
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-613
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Flarum Flarum Framework flarum:framework (from the name) | before 1.8.16 | CNA record |
References
- https://github.com/flarum/framework/releases/tag/v1.8.16release-notes
- https://github.com/flarum/framework/pull/4546issue-tracking
- https://github.com/flarum/framework/commit/5f080293a029d0d273eb9678d597c74ea86a3bccpatch
- https://www.vulncheck.com/advisories/flarum-session-persistence-via-improper-access-token-revocationthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.