CVE-2026-77254— MCP Atlassian: Unauthenticated HTTP MCP requests can use globally configured Jira and Confluence credentials
一分钟漏洞结论
影响对象
sooperset mcp-atlassian
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, requests to the HTTP MCP endpoint without a per-user identity are allowed to reach tool handlers, which then use globally configured Jira or C
影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| sooperset | mcp-atlassian | < 0.22.0 |
affected |
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一、 漏洞 CVE-2026-77254 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
MCP Atlassian: Unauthenticated HTTP MCP requests can use globally configured Jira and Confluence credentials
来源: 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, requests to the HTTP MCP endpoint without a per-user identity are allowed to reach tool handlers, which then use globally configured Jira or Confluence credentials. A network caller can perform operations with the operator account's permissions unless the deployment has an independent authentication boundary. The advisory traces the vulnerable input and processing flow through streamable-http, UserTokenMiddleware, _get_fetcher, and global credentials, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| sooperset | mcp-atlassian | < 0.22.0 | - |
|
二、漏洞 CVE-2026-77254 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-77254 补丁与修复 (1)
CVE-2026-77254 厂商页面 (1)
CVE-2026-77254 其他参考 (1)
同批安全公告 · sooperset · 2026-09-22 · 共 29 条
| CVE-2026-77244 | 10.0 CRITICAL | [mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier acce |
| CVE-2026-77274 | 8.8 HIGH | MCP Atlassian: SSRF Protection Bypass |
| CVE-2026-77243 | 8.8 HIGH | MCP Atlassian: ENABLED_TOOLS / Toolset authorization bypass |
| CVE-2026-77248 | 8.6 HIGH | MCP Atlassian: Unauthenticated arbitrary local file read via upload_attachment file_path, |
| CVE-2026-77255 | 8.6 HIGH | MCP Atlassian: Arbitrary File Read & Exfiltration (Confused Deputy) in JIRA update_issue |
| CVE-2026-77262 | 8.6 HIGH | MCP Atlassian: Path Traversal / Arbitrary File Read in confluence_upload_attachment MCP to |
| CVE-2026-77256 | 8.3 HIGH | MCP Atlassian: OAuth refresh-token backup file is world-readable under default Unix umask |
| CVE-2026-77271 | 8.3 HIGH | MCP Atlassian: Incomplete path traversal fix allows intra-CWD module overwrite and RCE (by |
| CVE-2026-77247 | 8.3 HIGH | MCP Atlassian: Arbitrary server-local file upload to Jira/Confluence attachments via unres |
| CVE-2026-77260 | 8.3 HIGH | MCP Atlassian: Arbitrary local file READ via unconstrained file_path in upload_attachment |
| CVE-2026-77257 | 8.3 HIGH | MCP Atlassian: HTTP upload tools accept arbitrary server-local file paths |
| CVE-2026-77267 | 8.3 HIGH | mcp-atlassian has an incomplete SSRF remediation |
| CVE-2026-77251 | 8.3 HIGH | MCP Atlassian: JIRA_PROJECTS_FILTER / CONFLUENCE_SPACES_FILTER allow forbidden-project con |
| CVE-2026-77259 | 7.7 HIGH | MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of |
| CVE-2026-77258 | 7.7 HIGH | MCP Atlassian: Arbitrary file read/exfiltration via upload_attachment missing validate_saf |
| CVE-2026-77242 | 7.5 HIGH | MCP Atlassian: Incomplete fix for CVE-2026-27826: DNS rebinding bypasses SSRF validation ( |
| CVE-2026-77246 | 7.4 HIGH | MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment U |
| CVE-2026-77253 | 7.1 HIGH | MCP Atlassian: Jira and Confluence attachment upload tools can read arbitrary server-local |
| CVE-2026-77261 | 7.1 HIGH | MCP Atlassian: SSRF redirect protection missing for basic-auth and OAuth authentication br |
| CVE-2026-77269 | 6.5 MEDIUM | MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read (incomplete |
显示前 20 条，共 29 条。 查看全部 → →
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V. Comments for CVE-2026-77254
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