CVE-2024-41926: Github.com/mattermost/mattermost/server/v8 Mattermost Allows Remote Actor To set Vulnerability
MODERATECVE-2024-41926 is a MODERATE (CVSS 2.7) mattermost allows remote actor to set vulnerability (CWE-284: Improper Access Control) affecting Github.com/mattermost/mattermost/server/v8 libraries in the Go ecosystem. The issue involves mattermost allows remote actor to set arbitrary remoteid values for synced users. Remediation is available by upgrading affected packages to version 9.5.7, 9.9.1, 8.0.0-20240604093018-5114c3b7cdb8, 5.3.2-0.20240604093018-5114c3b7cdb8.
CVE-2024-41926 at a Glance
Security Impact
CVSS: 2.7
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N).
How to Fix CVE-2024-41926
To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost/server/v8 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/v8 to 9.5.7Upgrade github.com/mattermost/mattermost/server/v8 to 9.9.1Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20240604093018-5114c3b7cdb8Upgrade github.com/mattermost/mattermost to 5.3.2-0.20240604093018-5114c3b7cdb8Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/mattermost/mattermost/server/v8How to Check if You Are Affected
To determine whether your application is affected by CVE-2024-41926, inspect your project dependencies for Github.com/mattermost/mattermost/server/v8:
inspect dependencies for github.com/mattermost/mattermost/server/v8Analyze the terminal output to locate any version of Github.com/mattermost/mattermost/server/v8 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.5.7), 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-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Github.com/mattermost/mattermost/server/v8, 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-2024-41926 Affected Github.com/mattermost/mattermost/server/v8 Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.5.0
< 9.5.7
|
9.5.7
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.9.0
< 9.9.1
All 1 versions
9.9.0
|
9.9.1
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
< 8.0.0-20240604093018-5114c3b7cdb8
|
8.0.0-20240604093018-5114c3b7cdb8
|
|
github.com/mattermost/mattermost
|
Go |
< 5.3.2-0.20240604093018-5114c3b7cdb8
|
5.3.2-0.20240604093018-5114c3b7cdb8
|
References
Frequently Asked Questions
What is CVE-2024-41926?
Which Github.com/mattermost/mattermost/server/v8 versions are affected?
What version fixes CVE-2024-41926?
Is github.com/mattermost/mattermost/server/v8 affected?
Is github.com/mattermost/mattermost affected?
What is the CVSS score of CVE-2024-41926?
What CWE is associated with CVE-2024-41926?
How can I check Go dependencies for CVE-2024-41926?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-9fpw-c9x7-cv3j",
"modified" : "2025-07-09T16:41:20Z",
"published" : "2024-08-01T15:32:23Z",
"aliases" : [ "CVE-2024-41926" ],
"summary" : "Mattermost allows remote actor to set arbitrary RemoteId values for synced users",
"details" : "Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a malicious remote to set arbitrary RemoteId values for synced users and therefore claim that a user was synced from another remote.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.5.0"
}, {
"fixed" : "9.5.7"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.9.0"
}, {
"fixed" : "9.9.1"
} ]
} ],
"versions" : [ "9.9.0" ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "8.0.0-20240604093018-5114c3b7cdb8"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "5.3.2-0.20240604093018-5114c3b7cdb8"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-41926"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost/commit/5114c3b7cdb84086959bf0ef8bc5afdaedf9fef6"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/mattermost/mattermost"
}, {
"type" : "WEB",
"url" : "https://mattermost.com/security-updates"
}, {
"type" : "WEB",
"url" : "https://pkg.go.dev/vuln/GO-2024-3022"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-284", "CWE-346" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2024-08-02T01:19:49Z",
"nvd_published_at" : "2024-08-01T15:15:13Z"
}
}