CVE-2026-2461

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Source
https://cve.org/CVERecord?id=CVE-2026-2461
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2461.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-2461
Aliases
Downstream
Related
Published
2026-03-16T11:16:32.720Z
Modified
2026-07-15T01:48:55.479907322Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Missing authorization check allows unauthorized modification of other users' comments on a board
Details

Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559

Database specific 
{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "last_affected": "11.0.3"
                },
                {
                    "last_affected": "11.2.2"
                },
                {
                    "last_affected": "10.10.11"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "cna_assigner": "Mattermost",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2461.json",
    "cwe_ids": [
        "CWE-639"
    ]
}
References

Affected packages

Git / github.com/mattermost/mattermost

Affected ranges

Type
GIT
Repo
https://github.com/mattermost/mattermost
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
fddd4a70bcb32eaff394a2fa5399efcd1b2ae251
Introduced
e62f350cd7a896c45a0e025f44cb8915f5597854
Fixed
005521aa79666e6960bc3302f6172b810f6bff3a
Introduced
d27a2195068ddfa3ce17cf470f9739e4edb94b83
Fixed
4082c3dcf285e4d1a386d2ef37f14f39dc5a0094
Database specific 
{
    "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "10.11.11"
        },
        {
            "introduced": "11.0.0"
        },
        {
            "last_affected": "11.0.3"
        },
        {
            "introduced": "11.1.0"
        },
        {
            "fixed": "11.2.3"
        },
        {
            "introduced": "11.3.0"
        },
        {
            "fixed": "11.3.1"
        }
    ]
}

Affected versions

@mattermost/client@10.*
@mattermost/client@10.11.0
@mattermost/client@11.*
@mattermost/client@11.3.0
@mattermost/types@10.*
@mattermost/types@10.11.0
@mattermost/types@11.*
@mattermost/types@11.3.0
Other
cloud-2022-07-20-1
cloud-2022-08-10-1
cloud-2022-09-08-1
cloud-2022-10-06-1
cloud-2022-11-11-1
cloud-2022-11-24-1
mattermost-redux@10.*
mattermost-redux@10.11.0
mattermost-redux@11.*
mattermost-redux@11.3.0
preview-v0.*
preview-v0.1
server/public/v0.*
server/public/v0.0.10
server/public/v0.0.11
server/public/v0.0.12
server/public/v0.0.13
server/public/v0.0.14
server/public/v0.0.15
server/public/v0.0.16
server/public/v0.0.17
server/public/v0.0.18
server/public/v0.0.5
server/public/v0.0.6
server/public/v0.0.7
server/public/v0.0.8
server/public/v0.0.9
server/public/v0.1.0
server/public/v0.1.1
server/public/v0.1.10
server/public/v0.1.11
server/public/v0.1.12
server/public/v0.1.13
server/public/v0.1.14
server/public/v0.1.15
server/public/v0.1.16
server/public/v0.1.17
server/public/v0.1.18
server/public/v0.1.19
server/public/v0.1.2
server/public/v0.1.20
server/public/v0.1.21
server/public/v0.1.3
server/public/v0.1.4
server/public/v0.1.5
server/public/v0.1.6
server/public/v0.1.7
server/public/v0.1.8
server/public/v0.1.9
v0.*
v0.5.0
v10.*
v10.11.0
v10.11.0-rc1
v10.11.0-rc2
v10.11.0-rc3
v10.11.1
v10.11.1-rc1
v10.11.10
v10.11.11-rc1
v10.11.2
v10.11.2-rc1
v10.11.2-rc2
v10.11.3
v10.11.4
v10.11.4-rc1
v10.11.4-rc2
v10.11.4-rc3
v10.11.5
v10.11.6
v10.11.7
v10.11.8
v10.11.9
v10.11.9-rc1
v11.*
v11.2.0
v11.2.0-rc1
v11.2.0-rc2
v11.2.0-rc3
v11.2.1
v11.2.1-rc1
v11.2.2
v11.3.0
v11.3.0-rc3
v11.3.0-rc4
v11.3.1-rc1
v4.*
v4.10.0-rc1
v4.2.0-rc1
v4.3.0-rc1
v4.4.0-rc1
v4.5.0-rc1
v4.6.0-rc1
v4.6.0-rc2
v4.7.0-rc1
v4.8.0-rc1
v4.9.0-rc1
v5.*
v5.0.0-rc1
v5.1.0-rc1
v5.2.0-rc1
v5.2.0-rc2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2461.json"