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CVE-2026-6961

—
CVSS 3.1
7.6 high
EPSS
<1%p23
Published
()
Modified
Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sync, which allows an attacker who controls a federated server to write files to arbitrary locations within the target server's filestore via path traversal sequences in the filename field.. Mattermost Advisory ID: MMSA-2026-00661

Vendors
mattermost
Products
mattermost server
Weakness
CWE-22
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L
NVD CVE.org GitHub PoCs EPSS (0.3%)

In the news

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