CVE-2026-39924 (GCVE-0-2026-39924)

Vulnerability from cvelistv5 – Published: 2026-08-05 14:40 – Updated: 2026-11-08 14:02 X_Open Source
VLAI
Title
Flarum < 1.8.16 Session Persistence via Improper Access Token Revocation
Summary
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.
Severity
7.6 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 15:48 UTC
CWE
  • CWE-613 - Insufficient Session Expiration
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 8174 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Flarum Flarum Framework Affected: 0 , < 1.8.16 (semver)
    cpe:2.3:a:flarum:flarum:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-04-11 00:00
Credits
Hamed Kohi VulnCheck
Show details on NVD website
To clipboard 

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}



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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.