CVE-2026-6961

HighCVSS 7.6/10Last modified Jun 18, 2026

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

Metrics

CVSS 3.1 7.6/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L

Weakness enumeration

CWE-22

Affected software

No affected versions have been published.

Timeline

Published
Jun 12, 2026
Last modified
Jun 18, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-696107.0Buffer over-read in Windows Win32K allows an authorized attacker to elevate privileges locally.CVE-2026-696117.0Use after free in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.CVE-2026-696127.8Absolute path traversal in Windows Error Reporting allows an authorized attacker to elevate privileges locally.CVE-2026-696137.0Use after free in Windows Image Acquisition allows an authorized attacker to elevate privileges locally.CVE-2026-696148.8Stack-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.CVE-2026-696154.8Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attCVE-2026-696165.5Out-of-bounds read in Windows Remote Desktop Services allows an authorized attacker to disclose information locally.CVE-2026-696177.0Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.CVE-2026-696185.5Out-of-bounds read in Windows SMB Client allows an authorized attacker to disclose information locally.CVE-2026-696198.8Out-of-bounds read in Windows exFAT File System allows an authorized attacker to elevate privileges over a network.CVE-2026-69626.4The Cost of Goods: Product Cost & Profit Calculator for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via thCVE-2026-696208.1Stack-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.
CVE-2026-6961: High severity, CVSS 7.6 | Vulnix