CVE-2026-9162

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-06-22. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to invalidate cached authentication state for active WebSocket connections during global session revocation, which allows a user with an existing WebSocket connection to remain authenticated and continue receiving real-time events until the cached session expires or the client reconnects.. Mattermost Advisory ID: MMSA-2026-00664

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

June 22, 2026

Last Modified

June 23, 2026

Advisory Details (1)

Auto-updated Jun 23, 2026
No patch confirmed yet.
generic

Security Updates

https://mattermost.com/security-updates

Vendor Advisories for CVE-2026-9162(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 15× in last 7d / 80× 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 148 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-9162?
CVE-2026-9162 is a medium vulnerability published on June 22, 2026. Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to invalidate cached authentication state for active WebSocket connections during global session revocation, which allows a user with an existing WebSocket connection to remain authenticated and…
When was CVE-2026-9162 disclosed?
CVE-2026-9162 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9162 actively exploited?
CVE-2026-9162 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 74.0% of all scored CVEs.
What is the CVSS score of CVE-2026-9162?
CVE-2026-9162 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-9162?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9162, 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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