Is mcp-atlassian affected by CVE-2026-27826?

PyPI mcp-atlassian is affected in <0.17.0.

Is CVE-2026-27826 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 1.2%.

high

CVE-2026-27826

Q: Is CVE-2026-27826 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 1.2%.

PyPI · mcp-atlassian

Summary

MCP Atlassian has SSRF via unvalidated X-Atlassian-Jira-Url / X-Atlassian-Confluence-Url headers

Severity: high
EPSS: 1.2% (p64)
Also known as: GHSA-7r34-79r5-rcc9
Published: 2026-03-10

References

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

Related advisories

CVE-2026-27825 — critical · PyPI/mcp-atlassian

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.