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I. Basic Information for CVE-2026-24661
Vulnerability Information

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Vulnerability Title
Unbounded Request Body Read in MS Teams Plugin {{/changes}} Webhook Endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost Plugins versions <=2.1.3.0 fail to limit the request body size on the {{/changes}} webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost Plugins 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Plugins是美国Mattermost公司的一个插件,提供强大的功能延伸和与服务器和网络/桌面应用程序都紧密整合。 Mattermost Plugins 2.1.3.0及之前版本存在安全漏洞,该漏洞源于未限制请求体大小,可能导致认证攻击者通过发送超大JSON负载造成内存耗尽和拒绝服务。
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
VendorProductAffected VersionsCPESubscribe
MattermostMattermost 0 ~ 2.1.3 -
II. Public POCs for CVE-2026-24661
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III. Intelligence Information for CVE-2026-24661
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IV. Related Vulnerabilities
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