Medium severity · published Mar 16, 2026
CVE-2026-2476
MS Teams plugin sensitive config values not properly masked in support packets
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
through 2.0.3 · source: vendor
MT
MS Teams · Mattermost
before 2.3.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2476
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2476
Vendor Advisory
https://mattermost.com/security-updates
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