CVE-2026-7387

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-12. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to require role-management authorization when setting the scheme_admin flag on group syncable link and patch endpoints, which allows a user with group-link permissions to escalate themselves and group members to team or channel admin via crafted API requests.. Mattermost Advisory ID: MMSA-2026-00665

CVSS v3
8.8
EG Score
8.8(high)
EPSS
21.6%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 18, 2026

Advisory Details (1)

Auto-updated Jun 12, 2026
No patch confirmed yet.
generic

Security Updates

https://mattermost.com/security-updates

Vendor Advisories for CVE-2026-7387(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 34× in last 7d / 125× 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 125 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-7387?
CVE-2026-7387 is a high vulnerability published on June 12, 2026. Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to require role-management authorization when setting the scheme_admin flag on group syncable link and patch endpoints, which allows a user with group-link permissions to escalate…
When was CVE-2026-7387 disclosed?
CVE-2026-7387 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7387 actively exploited?
CVE-2026-7387 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-7387?
CVE-2026-7387 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-7387?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7387, 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.

Dependency Blast Radius

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