CVE-2026-2325
MEDIUMImproper Input Validation in MS Teams Meetings API Handler
Title source: cnaDescription
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to limit the size of the request body on the start meeting API endpoint, which allows an authenticated attacker to cause resource exhaustion or denial of service via a crafted oversized HTTP POST request to {{/api/v1/meetings}}.. Mattermost Advisory ID: MMSA-2026-00608
References (1)
Core 1
Core References
Scores
CVSS v3
4.3
EPSS
0.0005
EPSS Percentile
14.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (8)
Mattermost/Mattermost
10.11.0 - 10.11.13
Mattermost/Mattermost
10.11.14
Mattermost/Mattermost
11.4.0 - 11.4.3
Mattermost/Mattermost
11.4.4
Mattermost/Mattermost
11.5.0 - 11.5.1
Mattermost/Mattermost
11.5.2
Mattermost/Mattermost
11.6.0
mattermost/mattermost_server
10.11.0 - 10.11.14
Published
May 18, 2026
Tracked Since
May 18, 2026