What is CVE-2026-27825?

CVE-2026-27825 is a critical-severity vulnerability in Sooperset Mcp-atlassian, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-03-10.

How severe is CVE-2026-27825?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2026-27825 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Sooperset Mcp-atlassian

CVE-2026-27825

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to version 0.17.0, the `confluence_download_attachment` MCP tool accepts a `download_path` parameter that is written to without any…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (5.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Sooperset Mcp-atlassian — versions < 0.17.0

Weakness classification (CWE)

Public proof-of-concept exploits

References

https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-xjgw-4wvw-rgm4 (x_refsource_CONFIRM)
https://github.com/sooperset/mcp-atlassian/commit/52b9b0997681e87244b20d58034deae89c91631e (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27825?: CVE-2026-27825 is a critical-severity vulnerability in Sooperset Mcp-atlassian, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-03-10.
How severe is CVE-2026-27825?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2026-27825 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.