CVE-2026-9693

LOWPre-NVD 3.53.5—
EchelonGraph scoreMEDIUM confidence

Score 3.5 from GitHub Security Advisory (severity: LOW) published 2026-08-18. A secondary CVSS source baseline 3.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
3.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 3.5Exploit: None knownExposed services: Not assessed

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

Mattermost versions 10.11.x <= 10.11.20, 11.7.x <= 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via the team threads API.. Mattermost Advisory ID: MMSA-2026-00682

CVSS v3
3.5
EG Score
3.5LOWmedium confidence
EG Risk
16
EG Risk 16/100CISA 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
Severity35% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

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 17, 2026

Last Modified

August 19, 2026

References (1)

Vendor Advisories for CVE-2026-9693(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 11× in last 7d / 46× 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.

  1. 2026-10-05 17:44 UTCEPSS rescore
  2. 2026-10-04 23:23 UTCEPSS rescore
  3. 2026-10-03 17:45 UTCEG score recompute
  4. 2026-10-03 17:45 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 17:57 UTCEPSS rescore
  7. 2026-10-01 19:51 UTCEPSS rescore
  8. 2026-09-30 15:04 UTCEPSS rescore
  9. 2026-09-30 11:58 UTCEG score recompute
  10. 2026-09-30 11:58 UTCGHSA enrichment
  11. 2026-09-29 15:24 UTCEPSS rescore
  12. 2026-09-28 13:52 UTCEPSS rescore
  13. 2026-09-28 13:52 UTCEPSS rescore
  14. 2026-09-27 13:49 UTCEPSS rescore
  15. 2026-09-27 08:03 UTCEG score recompute
  16. 2026-09-27 08:03 UTCGHSA enrichment
  17. 2026-09-26 15:59 UTCEPSS rescore
  18. 2026-09-24 14:04 UTCEPSS rescore
  19. 2026-09-23 17:54 UTCEPSS rescore
  20. 2026-09-23 13:12 UTCEG score recompute
  21. 2026-09-23 13:12 UTCGHSA enrichment
  22. 2026-09-22 16:01 UTCEPSS rescore
  23. 2026-09-21 21:09 UTCEPSS rescore
  24. 2026-09-20 20:16 UTCEPSS rescore
  25. 2026-09-20 09:44 UTCEG score recompute
Show 56 more
  1. 2026-09-20 09:44 UTCGHSA enrichment
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 19:32 UTCEPSS rescore
  4. 2026-09-17 03:44 UTCEG score recompute
  5. 2026-09-17 03:44 UTCGHSA enrichment
  6. 2026-09-16 14:09 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-13 23:35 UTCEG score recompute
  10. 2026-09-13 23:35 UTCGHSA enrichment
  11. 2026-09-13 16:48 UTCEPSS rescore
  12. 2026-09-12 15:02 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 09:38 UTCEPSS rescore
  15. 2026-09-10 20:07 UTCEG score recompute
  16. 2026-09-10 20:07 UTCGHSA enrichment
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-08 22:01 UTCEPSS rescore
  19. 2026-09-07 16:38 UTCEG score recompute
  20. 2026-09-07 16:38 UTCGHSA enrichment
  21. 2026-09-06 13:48 UTCEPSS rescore
  22. 2026-09-05 15:31 UTCEPSS rescore
  23. 2026-09-04 13:10 UTCEG score recompute
  24. 2026-09-04 13:10 UTCGHSA enrichment
  25. 2026-09-04 05:07 UTCEPSS rescore
  26. 2026-09-02 14:12 UTCEPSS rescore
  27. 2026-09-01 13:54 UTCEPSS rescore
  28. 2026-09-01 09:41 UTCEG score recompute
  29. 2026-09-01 09:41 UTCGHSA enrichment
  30. 2026-09-01 04:40 UTCEPSS rescore
  31. 2026-08-30 19:18 UTCEPSS rescore
  32. 2026-08-30 01:22 UTCEPSS rescore
  33. 2026-08-29 05:06 UTCEG score recompute
  34. 2026-08-29 05:06 UTCGHSA enrichment
  35. 2026-08-28 21:42 UTCEPSS rescore
  36. 2026-08-27 14:25 UTCEPSS rescore
  37. 2026-08-26 14:47 UTCEPSS rescore
  38. 2026-08-25 20:22 UTCEG score recompute
  39. 2026-08-25 20:22 UTCGHSA enrichment
  40. 2026-08-25 13:49 UTCEPSS rescore
  41. 2026-08-24 14:18 UTCEPSS rescore
  42. 2026-08-23 00:19 UTCEPSS rescore
  43. 2026-08-22 16:54 UTCEG score recompute
  44. 2026-08-22 16:54 UTCGHSA enrichment
  45. 2026-08-21 23:49 UTCEPSS rescore
  46. 2026-08-20 22:56 UTCEPSS rescore
  47. 2026-08-19 17:04 UTCEPSS rescore
  48. 2026-08-19 13:25 UTCGHSA enrichment
  49. 2026-08-18 15:23 UTCEG score recompute
  50. 2026-08-18 15:23 UTCGHSA enrichment
  51. 2026-08-18 14:49 UTCEG score recompute
  52. 2026-08-18 14:49 UTCGHSA enrichment
  53. 2026-08-18 13:49 UTCEPSS rescore
  54. 2026-08-17 23:22 UTCEG score recompute
  55. 2026-08-17 22:19 UTCEG score recompute
  56. 2026-08-17 22:18 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9693?
CVE-2026-9693 is a low vulnerability published on August 17, 2026. Mattermost versions 10.11.x <= 10.11.20, 11.7.x <= 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via…
When was CVE-2026-9693 disclosed?
CVE-2026-9693 was first published on August 17, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9693 actively exploited?
CVE-2026-9693 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9693?
CVE-2026-9693 has a CVSS base score of 3.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-9693?
No fix for CVE-2026-9693 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-9693 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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