{"action":"Upgrade mcp-atlassian to 0.17.0 or later.","affected":[{"fixed":"0.17.0","introduced":"0"}],"component":"mcp-atlassian","cve_ids":["CVE-2026-27826"],"ecosystem":"PyPI","epss":0.13681,"exploited":false,"fixed_versions":["0.17.0"],"ghsa_id":"GHSA-7r34-79r5-rcc9","id":"tcs_01M5KH0J6C7AX1073V2Z6PWBFB","modified_at":"2026-07-13T16:32:12.528827078Z","published_at":"2026-07-13T14:36:41.942079Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2621","https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-7r34-79r5-rcc9","https://github.com/sooperset/mcp-atlassian/commit/5cd697dfce9116ef330b8dc7a91291640e0528d9","https://github.com/sooperset/mcp-atlassian","https://pypi.org/project/mcp-atlassian","https://github.com/advisories/GHSA-7r34-79r5-rcc9","https://nvd.nist.gov/vuln/detail/CVE-2026-27826"],"severity":{"label":"high","score":8.2},"sources":[{"source":"osv","source_id":"PYSEC-2026-2621","url":"https://osv.dev/vulnerability/PYSEC-2026-2621"}],"summary":"MCP Atlassian has SSRF via unvalidated X-Atlassian-Jira-Url / X-Atlassian-Confluence-Url headers"}