TI-2026-53936 Aliases CVE-2026-77252

MCP Atlassian: JIRA_PROJECTS_FILTER and CONFLUENCE_SPACES_FILTER can be bypassed in search tools

LOW 29CWE-284Published 2026-09-22 · Updated 2026-09-23

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, caller-supplied projects_filter and spaces_filter arguments can replace administrator-configured allowlists, and caller-provided project or space clauses can suppress the configured restriction. A caller can search projects or spaces outside the intended boundary when the configured Atlassian credentials can access them. The advisory traces the vulnerable input and processing flow through JIRA_PROJECTS_FILTER, CONFLUENCE_SPACES_FILTER, projects_filter, spaces_filter, SearchMixin.search_issues, and SearchMixin.search, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00298 22nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed mcp-atlassian (sooperset): 0.22.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
sooperset	mcp-atlassian	before 0.22.0	0.22.0	Patch available	CNA

mcp-atlassian Vendorsooperset Affected before 0.22.0 Fixed in 0.22.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mcp-atlassian:mcp_atlassian::::::::	before 0.22.0	Vulnerable	Mcp-atlassian

cpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:* Versions before 0.22.0 Vulnerable ·Mcp-atlassian

Remediation

Fix · CNA mcp-atlassian (sooperset) Fixed in 0.22.0

Timeline

2026-10-02 Threatist record created from CVE-2026-77252

References

Exploit 1

https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-rqwg-9346-fjjv

Patch 2

Other 1

https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0

TI-2026-53938 MCP Atlassian: Unauthenticated HTTP MCP requests can use globally configured Jira and Confluence credentials CVSS 3.1CRITICAL 9.1
TI-2026-53957 MCP Atlassian: SSRF Protection Bypass CVSS 4.0HIGH 8.8
TI-2026-53935 Protection mechanism failure in sooperset mcp-atlassian CVSS 4.0HIGH 8.3
TI-2026-53946 Path traversal in sooperset mcp-atlassian CVSS 3.1HIGH 8.6
TI-2026-53932 Path traversal in sooperset mcp-atlassian CVSS 3.1HIGH 8.6
TI-2026-22177 Path traversal in sooperset mcp-atlassian CVSS 3.1CRITICAL 9.1

See all 33 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences