CVE-2026-2299

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 98% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
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.

The Mattermost Google Drive plugin before version 1.1.0 fails to validate channel membership in the file creation endpoint, allowing authenticated users with a connected Google account to share Google Drive files to unauthorized private channels and disclose private channel membership.

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
2%
KEV
Not listed

Published

June 25, 2026

Last Modified

August 11, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
Patch available. Sources: github_release.
github_release Patch Available

v1.1.0

Patch available: mattermost/mattermost-plugin-google-drive v1.1.0

https://github.com/mattermost/mattermost-plugin-google-drive/releases/tag/v1.1.0

Vendor Advisories for CVE-2026-2299(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 6× in last 7d / 50× 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 162 total refreshes for this CVE.

  1. 2026-09-11 14:52 UTCEPSS rescore
  2. 2026-09-10 09:34 UTCEPSS rescore
  3. 2026-09-08 22:00 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-04 05:06 UTCEPSS rescore
  8. 2026-09-02 14:11 UTCEPSS rescore
  9. 2026-09-01 13:53 UTCEPSS rescore
  10. 2026-09-01 04:39 UTCEPSS rescore
  11. 2026-09-01 04:39 UTCEPSS rescore
  12. 2026-08-30 19:30 UTCEG score recompute
  13. 2026-08-30 19:30 UTCGHSA enrichment
  14. 2026-08-28 21:41 UTCEPSS rescore
  15. 2026-08-27 23:17 UTCEG score recompute
  16. 2026-08-27 23:17 UTCGHSA enrichment
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-24 14:17 UTCEPSS rescore
  21. 2026-08-24 13:08 UTCEG score recompute
  22. 2026-08-24 13:08 UTCGHSA enrichment
  23. 2026-08-23 09:54 UTCEG score recompute
  24. 2026-08-23 09:54 UTCGHSA enrichment
  25. 2026-08-23 00:19 UTCEPSS rescore
Show 75 more
  1. 2026-08-22 10:00 UTCGHSA enrichment
  2. 2026-08-21 07:14 UTCEG score recompute
  3. 2026-08-21 07:14 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 07:02 UTCEG score recompute
  7. 2026-08-20 07:02 UTCGHSA enrichment
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-19 01:14 UTCEG score recompute
  10. 2026-08-19 01:14 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 13:45 UTCEG score recompute
  14. 2026-08-17 13:45 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 13:52 UTCEG score recompute
  17. 2026-08-16 13:52 UTCGHSA enrichment
  18. 2026-08-16 02:14 UTCEPSS rescore
  19. 2026-08-15 13:59 UTCEG score recompute
  20. 2026-08-15 13:59 UTCGHSA enrichment
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-14 14:05 UTCEG score recompute
  23. 2026-08-14 14:05 UTCGHSA enrichment
  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-13 14:12 UTCGHSA enrichment
  26. 2026-08-12 14:19 UTCEG score recompute
  27. 2026-08-12 14:19 UTCGHSA enrichment
  28. 2026-08-12 13:50 UTCEPSS rescore
  29. 2026-08-11 14:24 UTCEG score recompute▲ 0.10
  30. 2026-08-11 14:24 UTCGHSA enrichment
  31. 2026-08-11 14:24 UTCNVD updateCVSS v3 → 4.3
  32. 2026-08-11 01:48 UTCEG score recompute
  33. 2026-08-11 01:47 UTCGHSA enrichment
  34. 2026-08-11 00:00 UTCEPSS rescore
  35. 2026-08-10 01:54 UTCEG score recompute
  36. 2026-08-10 01:54 UTCGHSA enrichment
  37. 2026-08-09 13:46 UTCEPSS rescore
  38. 2026-08-09 02:01 UTCEG score recompute
  39. 2026-08-09 02:01 UTCGHSA enrichment
  40. 2026-08-08 16:37 UTCEPSS rescore
  41. 2026-08-08 02:08 UTCEG score recompute
  42. 2026-08-08 02:08 UTCGHSA enrichment
  43. 2026-08-07 02:15 UTCEG score recompute
  44. 2026-08-07 02:15 UTCGHSA enrichment
  45. 2026-08-06 13:46 UTCEPSS rescore
  46. 2026-08-06 02:22 UTCEG score recompute
  47. 2026-08-06 02:22 UTCGHSA enrichment
  48. 2026-08-05 19:17 UTCEPSS rescore
  49. 2026-08-05 02:29 UTCEG score recompute
  50. 2026-08-05 02:29 UTCGHSA enrichment
  51. 2026-08-04 15:10 UTCEPSS rescore
  52. 2026-08-04 02:20 UTCEG score recompute
  53. 2026-08-04 02:20 UTCGHSA enrichment
  54. 2026-08-03 10:36 UTCEPSS rescore
  55. 2026-08-03 02:27 UTCGHSA enrichment
  56. 2026-08-02 02:34 UTCEG score recompute
  57. 2026-08-02 02:34 UTCGHSA enrichment
  58. 2026-08-02 02:26 UTCEPSS rescore
  59. 2026-08-01 04:16 UTCEPSS rescore
  60. 2026-08-01 02:40 UTCGHSA enrichment
  61. 2026-07-31 00:36 UTCEG score recompute
  62. 2026-07-31 00:36 UTCGHSA enrichment
  63. 2026-07-30 16:27 UTCEPSS rescore
  64. 2026-07-30 01:30 UTCEPSS rescore
  65. 2026-07-30 00:42 UTCGHSA enrichment
  66. 2026-07-28 21:04 UTCEG score recompute
  67. 2026-07-28 21:04 UTCGHSA enrichment
  68. 2026-07-28 15:36 UTCEPSS rescore
  69. 2026-07-27 17:15 UTCEG score recompute
  70. 2026-07-27 17:15 UTCGHSA enrichment
  71. 2026-07-26 14:55 UTCEG score recompute
  72. 2026-07-26 14:55 UTCGHSA enrichment
  73. 2026-07-26 14:54 UTCEPSS rescore
  74. 2026-07-26 14:54 UTCEPSS rescore
  75. 2026-07-25 14:18 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-2299?
CVE-2026-2299 is a medium vulnerability published on June 25, 2026. The Mattermost Google Drive plugin before version 1.1.0 fails to validate channel membership in the file creation endpoint, allowing authenticated users with a connected Google account to share Google Drive files to unauthorized private channels and disclose private channel membership.
When was CVE-2026-2299 disclosed?
CVE-2026-2299 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-2299 actively exploited?
CVE-2026-2299 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 97.9% of all scored CVEs.
What is the CVSS score of CVE-2026-2299?
CVE-2026-2299 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-2299?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-2299, 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

Explore the affected products and dependency analysis for CVE-2026-2299

Explore →

Is Your Infrastructure Affected by CVE-2026-2299?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs