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Mattermost · Vulnerability

CVSS 3.1 4.3 MEDIUMCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-86348

Published

Mattermost versions <=11.9 11.0.9 11.4.8 11.7.7 10.22.11.0 fail to recover from handler panics, which allows an authenticated user to crash the plugin via a post-action request with an unexpected field type.. Mattermost Advisory ID: MMSA-2026-00701

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86348

Published

Mattermost

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "product": "Mattermost",
                    "vendor": "Mattermost",
                    "versions": [
                        {
                            "lessThanOrEqual": "<=11.9 11.0.9 11.4.8 11.7.7 10.22.11.0",
                            "status": "affected",
                            "version": "<=11.9 11.0.9 11.4.8 11.7.7 10.22.11.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "11.10.0",
                            "status": "unaffected"
                        },
                        {
                            "version": "11.9.1",
                            "status": "unaffected"
                        },
                        {
                            "version": "11.8.5",
                            "status": "unaffected"
                        },
                        {
                            "version": "11.7.8",
                            "status": "unaffected"
                        },
                        {
                            "version": "10.11.23",
                            "status": "unaffected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

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Sources read 13 Nov 15:18 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current