Vulnerabilities in pkg:golang/github.com/mattermost/mattermost-plugin-msteams-meetings
PACKAGECVE-2026-2325 is a MODERATE (CVSS 4.3) mattermost doesn't limit the size vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Github.com/mattermost/mattermost server libraries in the Go ecosystem. The issue involves mattermost doesn't limit the size of the request body on the start meeting api endpoint. Remediation is available by upgrading affected packages to version 11.5.2, 10.11.14, 11.4.4, 1.1.1-0.20260213105619-c5892dd169de.
pkg:golang/github.com/mattermost/mattermost-plugin-msteams-meetings
Vulnerability advisories affecting package pkg:golang/github.com/mattermost/mattermost-plugin-msteams-meetings. Select an advisory below to view technical details or fixes.
| Advisory ID | CVE / NVD | Severity | Summary |
|---|---|---|---|
| GHSA-m3p3-8frq-q7qh | CVE-2026-2325 | MODERATE | Mattermost doesn't limit the size of the request body on the start meeting API endpoint |
CVE-2026-2325 at a Glance
Security Impact
CVSS: 4.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).
How to Fix CVE-2026-2325
To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/mattermost/mattermost-server to 11.5.2Upgrade github.com/mattermost/mattermost-server to 10.11.14Upgrade github.com/mattermost/mattermost-server to 11.4.4Upgrade github.com/mattermost/mattermost-plugin-msteams-meetings to 1.1.1-0.20260213105619-c5892dd169deRun the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/mattermost/mattermost-serverHow to Check if You Are Affected
To determine whether your application is affected by CVE-2026-2325, inspect your project dependencies for Github.com/mattermost/mattermost server:
inspect dependencies for github.com/mattermost/mattermost-serverAnalyze the terminal output to locate any version of Github.com/mattermost/mattermost server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 11.5.2), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Github.com/mattermost/mattermost server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-2325 Affected Github.com/mattermost/mattermost server Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 11.5.0
< 11.5.2
|
11.5.2
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 10.11.0
< 10.11.14
|
10.11.14
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 11.4.0
< 11.4.4
|
11.4.4
|
|
github.com/mattermost/mattermost-plugin-msteams-meetings
|
Go |
< 1.1.1-0.20260213105619-c5892dd169de
|
1.1.1-0.20260213105619-c5892dd169de
|
References
Frequently Asked Questions
What is CVE-2026-2325?
Which Github.com/mattermost/mattermost server versions are affected?
What version fixes CVE-2026-2325?
Is github.com/mattermost/mattermost-server affected?
Is github.com/mattermost/mattermost-plugin-msteams-meetings affected?
What is the CVSS score of CVE-2026-2325?
What CWE is associated with CVE-2026-2325?
How can I check Go dependencies for CVE-2026-2325?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-m3p3-8frq-q7qh",
"modified" : "2026-06-01T15:51:34Z",
"published" : "2026-05-18T09:31:47Z",
"aliases" : [ "CVE-2026-2325" ],
"summary" : "Mattermost doesn't limit the size of the request body on the start meeting API endpoint",
"details" : "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",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "11.5.0"
}, {
"fixed" : "11.5.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.11.0"
}, {
"fixed" : "10.11.14"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "11.4.0"
}, {
"fixed" : "11.4.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-plugin-msteams-meetings"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.1.1-0.20260213105619-c5892dd169de"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-2325"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost-plugin-msteams-meetings/commit/c5892dd169de865504afa2dd02eaeb6287489f7f"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/mattermost/mattermost"
}, {
"type" : "WEB",
"url" : "https://mattermost.com/security-updates"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-770" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-06-01T15:51:34Z",
"nvd_published_at" : "2026-05-18T08:16:13Z"
}
}