CVE-2026-3590— Race Condition in Guest Magic Link Authentication Allows Token Reuse
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-3590
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Race Condition in Guest Magic Link Authentication Allows Token Reuse
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent requests.. Mattermost Advisory ID: MMSA-2026-00624
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
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 10.11.12及之前的10.11.x版本、11.5.0及之前的11.5.x版本、11.4.2及之前的11.4.x版本和11.3.2及之前的11.3.x版本存在安全漏洞，该漏洞源于未强制实施访客魔法链接令牌的原子单次使用，可能导致攻击者建立多个独立的经过身份验证的会话。
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 | 10.11.0 ~ 10.11.12 | - |
II. Public POCs for CVE-2026-3590
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-3590
请登录查看更多情报信息。
Same Patch Batch · Mattermost · 2026-04-15 · 3 CVEs total
| CVE-2026-28741 | 6.8 MEDIUM | CSRF Protection Bypass Allows Updating a User's Authentication Method |
| CVE-2026-27769 | 2.7 LOW | Connected Workspaces: Malicious remote server can manipulate arbitrary user's status |
IV. Related Vulnerabilities
Same product: Mattermost
- 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} - CVE-2026-3524
Authorization Bypass in Mattermost Legal Hold Plugin Due to
Same vendor: Mattermost
- 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} - CVE-2026-3524
Authorization Bypass in Mattermost Legal Hold Plugin Due to
Same weakness: CWE-367
- CVE-2026-42344
FastGPT: DNS rebinding TOCTOU bypass in isInternalAddress al - CVE-2026-44694
n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API clien - CVE-2025-69233
Apache CloudStack: Domain/account resources limits not honor - CVE-2026-34354
Akamai Guardicore Platform Agent 安全漏洞 - CVE-2026-41002
VMware Spring Cloud Config 安全漏洞
V. Comments for CVE-2026-3590
No comments yet