CVE Watch29 sept 2026

CVE-2026-77260

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the Confluence and Jir

CVSS

7.5

Alto

EPSS

0.3%

p27

KEV

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Exploit Today

0-100

Publicado: 22 sept 2026 · Última mod.: 29 sept 2026 · CWE-22

EPSS · 30d

0.3%EPSS · 30 días0.5%

2026-09-232026-10-20

Descripción técnica

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the Confluence and Jira upload_attachment implementations accept an unconstrained file_path and open the referenced server-local file. A permitted MCP caller can upload sensitive host files to an Atlassian destination and then retrieve their contents. The advisory traces the vulnerable input and processing flow through upload_attachment, file_path, and CVE-2026-27825, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

Referencias oficiales

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