CVE-2026-9602

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-07-17. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00678

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 17, 2026

Advisory Details (1)

Auto-updated Jul 17, 2026
No patch confirmed yet.
generic

Security Updates

https://mattermost.com/security-updates

Vendor Advisories for CVE-2026-9602(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 / 176× 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 176 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9602?
CVE-2026-9602 is a medium vulnerability published on July 17, 2026. Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID:…
When was CVE-2026-9602 disclosed?
CVE-2026-9602 was first published in the National Vulnerability Database on July 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9602 actively exploited?
CVE-2026-9602 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 85.5% of all scored CVEs.
What is the CVSS score of CVE-2026-9602?
CVE-2026-9602 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-9602?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9602, 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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