MCP Atlassian: Incomplete fix for GHSA-7r34-79r5-rcc9: redirect-based SSRF via unhooked requests session in Jira user-permission lookup

Summary The fix for the SSRF vulnerability tracked as GHSA-7r34-79r5-rcc9 / CVE-2026-27826 is incomplete. That fix added two defenses: validateurlforssrf on the per-request X-Atlassian-Jira-Url / X-Atlassian-Confluence-Url headers blocking a directly-internal base URL, and a redirect-validation...

CVE-2026-77249

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, JiraUserMixin.lookupuserbypermissions uses the module-level requests.get function instead of the fetcher's protected session. A caller-controlled public Jira URL can redirect that...

EUVD-2026-84759

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, JiraUserMixin.lookupuserbypermissions uses the module-level requests.get function instead of the fetcher's protected session. A caller-controlled public Jira URL can redirect that...

CVE-2026-77249 MCP Atlassian: Incomplete fix for CVE-2026-27826: redirect-based SSRF via unhooked requests session in Jira user-permission lookup

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, JiraUserMixin.lookupuserbypermissions uses the module-level requests.get function instead of the fetcher's protected session. A caller-controlled public Jira URL can redirect that...

CVE-2026-77249

MCP Atlassian , an MCP server for Confluence and Jira, is vulnerable to a Server-Side Request Forgery (SSRF) via redirect-based attacks in versions prior to 0.22.0 . The root cause is that the JiraUserMixin._lookup_user_by_permissions function uses the module-level requests.get instead of a prote...

CVE-2026-77249 MCP Atlassian: Incomplete fix for CVE-2026-27826: redirect-based SSRF via unhooked requests session in Jira user-permission lookup

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, JiraUserMixin.lookupuserbypermissions uses the module-level requests.get function instead of the fetcher's protected session. A caller-controlled public Jira URL can redirect that...