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CVE-2026-10600— Denial of service via unbounded document content extraction in Mattermost Server

Quick assessment

Affected
Mattermost Mattermost
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mattermost是美国Mattermost公司开源的一个开源协作平台。 Mattermost 11.8.0及之前版本、11.7.3及之前版本、11.6.5及之前版本和10.11.20及之前版本存在资源管理错误漏洞，该漏洞源于服务器端文档内容提取的时间和资源消耗未限制，可能导致具有文件上传权限的认证用户通过重复上传小文档耗尽共享提取工作线程池，降低服务器上所有用户的文件上传能力。

CVSS 4.3 · Medium EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 9

VendorProduct Version RangeStatus
Mattermost Mattermost 11.8.0≤ 11.8.0 affected
11.7.0≤ 11.7.3 affected
11.6.0≤ 11.6.5 affected
10.11.0≤ 10.11.20 affected
11.9.0 unaffected
11.8.1 unaffected
11.7.4 unaffected
11.6.6 unaffected
… +1 more rows
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I. Basic Information for CVE-2026-10600

Vulnerability Information
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Vulnerability Title
Denial of service via unbounded document content extraction in Mattermost Server
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to bound the time and resource consumption of server-side document content extraction which allows an authenticated user with file-upload permission to degrade file uploads for all users on the server via repeatedly uploading small documents that are cheap to upload but expensive to extract, saturating the shared extraction worker pool.. Mattermost Advisory ID: MMSA-2026-00694
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost是美国Mattermost公司开源的一个开源协作平台。 Mattermost 11.8.0及之前版本、11.7.3及之前版本、11.6.5及之前版本和10.11.20及之前版本存在资源管理错误漏洞，该漏洞源于服务器端文档内容提取的时间和资源消耗未限制，可能导致具有文件上传权限的认证用户通过重复上传小文档耗尽共享提取工作线程池，降低服务器上所有用户的文件上传能力。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mattermost Mattermost 11.8.0 ~ 11.8.0 -

II. Public POCs for CVE-2026-10600

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III. Intelligence Information for CVE-2026-10600

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IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-770

V. Comments for CVE-2026-10600

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