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CVE-2026-73498— MCP Atlassian is a Model Context Protocol (MCP): Arbitrary file read via missing path validation in confluence_upload_attachment

Quick assessment

Affected
sooperset mcp-atlassian
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hyeonsoo Lee MCP Atlassian是Hyeonsoo Lee个人开发者开源的一个支持团队协作与任务跟踪的模型上下文协议适配服务。 Hyeonsoo Lee MCP Atlassian 0.22.0之前版本存在路径遍历漏洞，该漏洞源于confluence_upload_attachment函数未验证文件路径，将客户端提供的file_path直接用于打开文件，可能导致经过身份验证的MCP客户端读取服务器进程可访问的任意文件并上传至Confluence，还可能泄露环境变量和凭据。

CVSS 7.7 · High EPSS 0.48% · P40

Affected Version Matrix 1

VendorProduct Version RangeStatus
sooperset mcp-atlassian < 0.22.0 affected
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I. Basic Information for CVE-2026-73498

Vulnerability Information
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Vulnerability Title
MCP Atlassian is a Model Context Protocol (MCP): Arbitrary file read via missing path validation in confluence_upload_attachment
Source: CVE Program / CVE List V5
Vulnerability Description
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, confluence_upload_attachment passes its client-supplied file_path directly to open(file_path, "rb") in src/mcp_atlassian/confluence/attachments.py through _upload_attachment_direct() without calling validate_safe_path. An authenticated MCP client can read any file accessible to the server process and exfiltrate it to Confluence as an attachment. If an AI agent can be induced to call the tool through untrusted content, the same flaw can disclose server environment variables such as CONFLUENCE_API_TOKEN and other credentials. This issue is fixed in version 0.22.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Hyeonsoo Lee MCP Atlassian 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hyeonsoo Lee MCP Atlassian是Hyeonsoo Lee个人开发者开源的一个支持团队协作与任务跟踪的模型上下文协议适配服务。 Hyeonsoo Lee MCP Atlassian 0.22.0之前版本存在路径遍历漏洞，该漏洞源于confluence_upload_attachment函数未验证文件路径，将客户端提供的file_path直接用于打开文件，可能导致经过身份验证的MCP客户端读取服务器进程可访问的任意文件并上传至Confluence，还可能泄露环境变量和凭据。
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
sooperset mcp-atlassian < 0.22.0 -

II. Public POCs for CVE-2026-73498

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
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Qwen3.6-35B-A3B · 9748 chars
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III. Intelligence Information for CVE-2026-73498

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Patches & Fixes for CVE-2026-73498 (1)

Vendor Advisories for CVE-2026-73498 (1)

Vendor Pages for CVE-2026-73498 (1)

IV. Related Vulnerabilities

Same product: mcp-atlassian
Same vendor: sooperset
Same weakness: CWE-22

V. Comments for CVE-2026-73498

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