CVE-2026-39924

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

Score 6.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. a secondary CVSS source baseline 6.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
6.8
EG Score
6.8(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity68% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

August 5, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 5, 2026
Patch available. Sources: github_release, github_pr, github_commit.
generic

Flarum < 1.8.16 Session Persistence via Improper Access Token Revocation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/flarum-session-persistence-via-improper-access-token-revocation
github_commit Patch Available

commit 5f080293a029 (flarum/framework)

Patch available: flarum/framework v1.8.16 (contains commit 5f080293a029)

https://github.com/flarum/framework/commit/5f080293a029d0d273eb9678d597c74ea86a3bcc
github_pr Patch Available

[1.x] fix: invalidate active sessions when password is changed

Patch available: flarum/framework v1.8.16 (PR #4546 merged 2026-04-11)

https://github.com/flarum/framework/pull/4546
github_release Patch Available

v1.8.16

Patch available: flarum/framework v1.8.16

https://github.com/flarum/framework/releases/tag/v1.8.16

Vendor Advisories for CVE-2026-39924(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 79× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 123 total refreshes for this CVE.

  1. 2026-09-19 04:14 UTCEG score recompute
  2. 2026-09-19 04:13 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 04:02 UTCEG score recompute
  6. 2026-09-18 04:02 UTCGHSA enrichment
  7. 2026-09-17 19:30 UTCEPSS rescore
  8. 2026-09-17 03:51 UTCEG score recompute
  9. 2026-09-17 03:51 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-16 03:12 UTCEG score recompute
  13. 2026-09-16 03:12 UTCGHSA enrichment
  14. 2026-09-15 03:11 UTCEPSS rescore
  15. 2026-09-15 01:29 UTCGHSA enrichment
  16. 2026-09-13 21:49 UTCEG score recompute
  17. 2026-09-13 21:49 UTCGHSA enrichment
  18. 2026-09-13 16:47 UTCEPSS rescore
  19. 2026-09-12 21:39 UTCEG score recompute
  20. 2026-09-12 21:39 UTCGHSA enrichment
  21. 2026-09-12 15:01 UTCEPSS rescore
  22. 2026-09-11 21:28 UTCEG score recompute
  23. 2026-09-11 21:28 UTCGHSA enrichment
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-11 09:37 UTCEPSS rescore
Show 75 more
  1. 2026-09-10 21:14 UTCEG score recompute
  2. 2026-09-10 21:14 UTCGHSA enrichment
  3. 2026-09-10 09:34 UTCEPSS rescore
  4. 2026-09-09 21:04 UTCEG score recompute
  5. 2026-09-09 21:04 UTCGHSA enrichment
  6. 2026-09-09 06:22 UTCEG score recompute
  7. 2026-09-09 06:22 UTCGHSA enrichment
  8. 2026-09-08 22:00 UTCEPSS rescore
  9. 2026-09-07 18:17 UTCEG score recompute
  10. 2026-09-07 18:17 UTCGHSA enrichment
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-06 09:53 UTCEG score recompute
  14. 2026-09-06 09:53 UTCGHSA enrichment
  15. 2026-09-05 09:43 UTCEG score recompute
  16. 2026-09-05 09:43 UTCGHSA enrichment
  17. 2026-09-04 09:33 UTCEG score recompute
  18. 2026-09-04 09:32 UTCGHSA enrichment
  19. 2026-09-04 05:06 UTCEPSS rescore
  20. 2026-09-03 06:48 UTCEG score recompute
  21. 2026-09-03 06:48 UTCGHSA enrichment
  22. 2026-09-02 14:12 UTCEPSS rescore
  23. 2026-09-01 23:00 UTCEG score recompute
  24. 2026-09-01 23:00 UTCGHSA enrichment
  25. 2026-09-01 13:53 UTCEPSS rescore
  26. 2026-09-01 04:39 UTCEPSS rescore
  27. 2026-08-31 22:49 UTCGHSA enrichment
  28. 2026-08-30 21:34 UTCEG score recompute
  29. 2026-08-30 21:34 UTCGHSA enrichment
  30. 2026-08-30 19:17 UTCEPSS rescore
  31. 2026-08-30 01:22 UTCEPSS rescore
  32. 2026-08-29 21:23 UTCEG score recompute
  33. 2026-08-29 21:23 UTCGHSA enrichment
  34. 2026-08-28 21:41 UTCEPSS rescore
  35. 2026-08-27 21:22 UTCEG score recompute
  36. 2026-08-27 21:22 UTCGHSA enrichment
  37. 2026-08-27 14:25 UTCEPSS rescore
  38. 2026-08-26 21:12 UTCEG score recompute
  39. 2026-08-26 21:12 UTCGHSA enrichment
  40. 2026-08-26 14:46 UTCEPSS rescore
  41. 2026-08-25 20:57 UTCEG score recompute
  42. 2026-08-25 20:56 UTCGHSA enrichment
  43. 2026-08-25 13:49 UTCEPSS rescore
  44. 2026-08-24 20:46 UTCEG score recompute
  45. 2026-08-24 20:46 UTCGHSA enrichment
  46. 2026-08-23 20:36 UTCEG score recompute
  47. 2026-08-23 20:36 UTCGHSA enrichment
  48. 2026-08-23 00:19 UTCEPSS rescore
  49. 2026-08-22 20:26 UTCEG score recompute
  50. 2026-08-22 20:26 UTCGHSA enrichment
  51. 2026-08-21 23:49 UTCEPSS rescore
  52. 2026-08-21 20:16 UTCEG score recompute
  53. 2026-08-21 20:16 UTCGHSA enrichment
  54. 2026-08-20 22:55 UTCEPSS rescore
  55. 2026-08-20 20:05 UTCGHSA enrichment
  56. 2026-08-19 19:55 UTCEG score recompute
  57. 2026-08-19 19:55 UTCGHSA enrichment
  58. 2026-08-19 17:03 UTCEPSS rescore
  59. 2026-08-18 19:41 UTCEG score recompute
  60. 2026-08-18 19:41 UTCGHSA enrichment
  61. 2026-08-18 13:48 UTCEPSS rescore
  62. 2026-08-17 19:31 UTCEG score recompute
  63. 2026-08-17 19:31 UTCGHSA enrichment
  64. 2026-08-17 13:47 UTCEPSS rescore
  65. 2026-08-16 17:40 UTCEG score recompute
  66. 2026-08-16 17:40 UTCGHSA enrichment
  67. 2026-08-16 14:56 UTCEPSS rescore
  68. 2026-08-16 02:14 UTCEPSS rescore
  69. 2026-08-15 17:22 UTCEG score recompute
  70. 2026-08-15 17:22 UTCGHSA enrichment
  71. 2026-08-15 01:30 UTCEPSS rescore
  72. 2026-08-14 17:11 UTCEG score recompute
  73. 2026-08-14 17:11 UTCGHSA enrichment
  74. 2026-08-13 22:00 UTCEPSS rescore
  75. 2026-08-13 17:52 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-39924?
CVE-2026-39924 is a medium vulnerability published on August 5, 2026. 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 accesstokens table is never cleared on password change events. The…
When was CVE-2026-39924 disclosed?
CVE-2026-39924 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39924 actively exploited?
CVE-2026-39924 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.6% of all scored CVEs.
What is the CVSS score of CVE-2026-39924?
CVE-2026-39924 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-39924?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39924, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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