CVE-2026-2299

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreHIGH confidence

Score 4.2 from GitHub Security Advisory published 2026-06-25. a secondary CVSS source baseline 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.2Exploit: NoneExposed: 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
4.2
EG Score
4.2(high)
EPSS
2.1%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 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 20× in last 7d / 37× 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. 2026-07-06 20:52 UTCEG score recompute
  2. 2026-07-06 20:51 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. 2026-07-05 20:53 UTCEG score recompute
  8. 2026-07-05 20:53 UTCGHSA enrichment
  9. 2026-07-04 20:55 UTCEG score recompute
  10. 2026-07-04 20:55 UTCGHSA enrichment
  11. 2026-07-03 21:01 UTCEG score recompute
  12. 2026-07-03 21:01 UTCGHSA enrichment
  13. 2026-07-02 21:08 UTCEG score recompute
  14. 2026-07-02 21:08 UTCGHSA enrichment
  15. 2026-07-01 21:15 UTCEG score recompute
  16. 2026-07-01 21:15 UTCGHSA enrichment
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-06-30 23:22 UTCEPSS rescore
  19. 2026-06-30 21:22 UTCEG score recompute
  20. 2026-06-30 21:22 UTCGHSA enrichment
  21. 2026-06-29 21:28 UTCEG score recompute
  22. 2026-06-29 21:28 UTCGHSA enrichment
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-28 21:35 UTCEG score recompute
Show 12 more
  1. 2026-06-28 21:35 UTCGHSA enrichment
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 21:41 UTCEG score recompute
  7. 2026-06-27 21:41 UTCGHSA enrichment
  8. 2026-06-27 03:08 UTCEPSS rescore
  9. 2026-06-26 21:48 UTCEG score recompute
  10. 2026-06-26 21:48 UTCGHSA enrichment
  11. 2026-06-25 21:46 UTCEG score recompute
  12. 2026-06-25 21:46 UTCGHSA enrichment

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 June 26, 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 2.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-2299?
CVE-2026-2299 has a CVSS v3 base score of 4.2 (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

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