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: 0.4%CVSS: 6.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
6.8MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100CISA SSVC

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%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
28th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 13× in last 7d / 68× 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 152 total refreshes for this CVE.

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

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 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 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-39924?
CVE-2026-39924 has a CVSS base score of 6.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-39924?
A fix for CVE-2026-39924 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-39924 are linked in the Vendor Advisories panel on this page.

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