CVE-2026-3112— Arbitrary File Read via Advanced Logging Support Packet
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I. Basic Information for CVE-2026-3112
Vulnerability Information
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Vulnerability Title
Arbitrary File Read via Advanced Logging Support Packet
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to validate Advanced Logging file target paths which allows system administrators to read arbitrary host files via malicious AdvancedLoggingJSON configuration in support packet generation. Mattermost Advisory ID: MMSA-2025-00562
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost存在安全漏洞，该漏洞源于未验证高级日志文件目标路径，可能导致系统管理员通过恶意配置读取任意主机文件。以下版本受到影响：11.4.0及之前的11.4.x版本、11.3.1及之前的11.3.x版本、11.2.3及之前的11.2.x版本和10.11.11及之前的10.11.x版本。
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 | 11.4.0 ~ 11.4.0 | - |
II. Public POCs for CVE-2026-3112
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2026-03-26 · 8 CVEs total
| CVE-2026-3108 | 8.0 HIGH | Terminal Escape Injection in mmctl Report Posts Command |
| CVE-2026-3114 | 6.5 MEDIUM | Zip Bomb Denial of Service via Unrestricted Archive Decompression |
| CVE-2026-4274 | 5.4 MEDIUM | Insufficient authorization in shared channel membership sync grants team-level access inst |
| CVE-2026-3113 | 5.0 MEDIUM | mmctl export download command doesn’t restrict permissions to created file to file owner |
| CVE-2026-3116 | 4.9 MEDIUM | Improper Input Validation in Zoom Plugin Webhook Handler |
| CVE-2026-3115 | 4.3 MEDIUM | Guest users can view group member IDs without respecting view restrictions |
| CVE-2026-3109 | 2.2 LOW | Missing timestamp validation in Zoom webhook handler |
IV. Related Vulnerabilities
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Unbounded Request Body Read in MS Teams Plugin {{/changes}} - CVE-2026-21388
Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}
Same vendor: Mattermost
- CVE-2026-3590
Race Condition in Guest Magic Link Authentication Allows Tok - CVE-2026-28741
CSRF Protection Bypass Allows Updating a User's Authenticati - CVE-2026-27769
Connected Workspaces: Malicious remote server can manipulate - CVE-2026-24661
Unbounded Request Body Read in MS Teams Plugin {{/changes}} - CVE-2026-21388
Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}
Same weakness: CWE-22
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V. Comments for CVE-2026-3112
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