CVE-2026-77252: CWE-284: Improper Access Control in sooperset mcp-atlassian
CVE-2026-77252 is an improper access control vulnerability in sooperset's mcp-atlassian server affecting versions prior to 0.22.0. It allows a caller to override administrator-configured allowlists for projects and spaces filters, enabling searches outside intended boundaries when Atlassian credentials permit. This flaw is fixed in version 0.22.0.
AI Analysis
Technical Summary
The vulnerability in sooperset mcp-atlassian (a Model Context Protocol server for Atlassian products Confluence and Jira) arises from improper access control (CWE-284). Before version 0.22.0, user-supplied 'projects_filter' and 'spaces_filter' parameters can replace administrator-configured allowlists, and user-provided project or space clauses can suppress these restrictions. This enables unauthorized searching of projects or spaces beyond intended limits if the configured Atlassian credentials have access. The issue affects code paths including JIRA_PROJECTS_FILTER, CONFLUENCE_SPACES_FILTER, projects_filter, spaces_filter, SearchMixin.search_issues, and SearchMixin.search. The vulnerability is resolved in version 0.22.0.
Potential Impact
An attacker with access to the MCP Atlassian server prior to version 0.22.0 can bypass configured project and space restrictions, potentially accessing sensitive project or space information beyond intended boundaries. The confidentiality of data is impacted (high confidentiality impact), but integrity and availability are not affected. Exploitation requires network access and privileges to use the service.
Mitigation Recommendations
Upgrade to version 0.22.0 or later, where this improper access control vulnerability is fixed. No other mitigation or temporary workaround is indicated. Since this is not a cloud service, remediation depends on applying the official fix.
CVE-2026-77252: CWE-284: Improper Access Control in sooperset mcp-atlassian
Description
CVE-2026-77252 is an improper access control vulnerability in sooperset's mcp-atlassian server affecting versions prior to 0.22.0. It allows a caller to override administrator-configured allowlists for projects and spaces filters, enabling searches outside intended boundaries when Atlassian credentials permit. This flaw is fixed in version 0.22.0.
CVSS v3.1
Score 6.5medium
Affected software
sooperset
mcp-atlassian
pkg:github/sooperset/mcp-atlassianRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in sooperset mcp-atlassian (a Model Context Protocol server for Atlassian products Confluence and Jira) arises from improper access control (CWE-284). Before version 0.22.0, user-supplied 'projects_filter' and 'spaces_filter' parameters can replace administrator-configured allowlists, and user-provided project or space clauses can suppress these restrictions. This enables unauthorized searching of projects or spaces beyond intended limits if the configured Atlassian credentials have access. The issue affects code paths including JIRA_PROJECTS_FILTER, CONFLUENCE_SPACES_FILTER, projects_filter, spaces_filter, SearchMixin.search_issues, and SearchMixin.search. The vulnerability is resolved in version 0.22.0.
Potential Impact
An attacker with access to the MCP Atlassian server prior to version 0.22.0 can bypass configured project and space restrictions, potentially accessing sensitive project or space information beyond intended boundaries. The confidentiality of data is impacted (high confidentiality impact), but integrity and availability are not affected. Exploitation requires network access and privileges to use the service.
Mitigation Recommendations
Upgrade to version 0.22.0 or later, where this improper access control vulnerability is fixed. No other mitigation or temporary workaround is indicated. Since this is not a cloud service, remediation depends on applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-20T19:02:23.416Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab2c2eef7a7c541068b81d1
Added to database: 09/22/2026, 18:03:26 UTC
Last enriched: 09/22/2026, 18:18:45 UTC
Last updated: 09/22/2026, 21:48:36 UTC
Views: 5
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