CVE Watch22 sept 2026

CVE-2026-77242

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

CVSS

7.5

Alto

EPSS

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KEV

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Exploit Today

0-100

Publicado: 22 sept 2026 · Última mod.: 22 sept 2026 · CWE-367 · CWE-918

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, validate_url_for_ssrf checks a hostname's resolved addresses, but Requests and urllib3 resolve the hostname again when connecting. A caller can use a short-lived DNS answer that is public during validation and private during connection, preserving unauthenticated access to internal or metadata endpoints despite the earlier CVE-2026-27826 remediation. The advisory traces the vulnerable input and processing flow through validate_url_for_ssrf, _check_dns_resolution, socket.getaddrinfo, and _make_ssrf_safe_hook, 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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