CVE-2026-2299: The Mattermost Google Drive plugin before version 1.1.0 fails to validate channel membership in the file creat

Q: How do I fix CVE-2026-2299?

google drive: upgrade to 1.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-2299 being exploited?

CVE-2026-2299 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-2299 affect?

CVE-2026-2299 affects google drive. Severity is medium (CVSS 4.2). 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 cha

Q: How urgent is CVE-2026-2299?

Priority 17/100. No elevated risk signals yet.

Routine

MEDIUM 4.2UPGRADE

CVE-2026-2299 is a medium-severity flaw (CVSS 4.2) affecting google drive. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.2 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-06-25
Last modified	2026-10-25

Publisher (CNA): Mattermost, Inc. · Vendor: mattermost

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-25 20:17 UTCPublished CVE record published
2026-10-25 22:10 UTCUpdated Record last modified

mattermost google drive UPGRADE

Affected: < 1.1.0 · 1.1.0 rc1 · 1.1.0 rc2

Fixed in: 1.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy google-drive || rpm -q google-drive || google-drive --version

2. UPGRADE to 1.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade google-drive

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade google-drive

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-2299?

google drive: upgrade to 1.1.0. Exact commands for each OS are on this page.

Is CVE-2026-2299 being exploited?

CVE-2026-2299 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-2299 affect?

CVE-2026-2299 affects google drive. Severity is medium (CVSS 4.2). 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 cha

How urgent is CVE-2026-2299?

Priority 17/100. No elevated risk signals yet.

Software pages

Mattermost vulnerabilities

References

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