CVE-2026-77267: mcp-atlassian has an incomplete SSRF remediation
The UserTokenMiddleware extracts URLs from X-Atlassian-Jira-Url and X-Atlassian-Confluence-Url HTTP headers and passes them directly to API client constructors without any SSRF validation.
References
- github.com/advisories/GHSA-5wf4-jqxh-8gm3
- github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460
- github.com/sooperset/mcp-atlassian/pull/1448
- github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0
- github.com/sooperset/mcp-atlassian/security/advisories/GHSA-5wf4-jqxh-8gm3
- nvd.nist.gov/vuln/detail/CVE-2026-77267
Code Behaviors & Features
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