CVE Watch22 sept 2026

CVE-2026-77244

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

CVSS

10.0

Crítico

EPSS

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KEV

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Exploit Today

0-100

Publicado: 22 sept 2026 · Última mod.: 22 sept 2026 · CWE-287 · CWE-303 · CWE-862

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the HTTP transport accepts requests without a verified user identity and downstream fetcher construction falls back to the operator's globally configured Jira or Confluence credentials. A network client that can reach the MCP endpoint can invoke Atlassian tools as the operator, including read and write operations available to that account. The advisory traces the vulnerable input and processing flow through UserTokenMiddleware, AtlassianOpaqueTokenVerifier, _get_fetcher, and streamable-http, 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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