CVE-2026-77261

Description officielle (NVD)

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, _make_ssrf_safe_hook is omitted from JiraFetcher and ConfluenceFetcher sessions created through the basic-auth and oauth_pat branches. If an attacker-controlled or compromised configured Atlassian instance returns a redirect to an internal address, those sessions can follow the redirect without revalidating its destination. This issue is fixed in version 0.22.0.

Références

• https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460 , Patch
• https://github.com/sooperset/mcp-atlassian/pull/1448 , Patch
• https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0 , Release Notes
• https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-6529-c226-h328 , Exploit, Vendor Advisory

En bref

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS : probabilité estimée d'exploitation dans les 30 prochains jours.

Produits concernés

Sources officielles

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