Is CVE-2026-77252 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-77252 being exploited in the wild.

How severe is CVE-2026-77252?

Medium severity, with a CVSS score of 6.5, published 22 September 2026.

Which products and versions are affected?

Sooperset Mcp-Atlassian prior to 0.22.0.

Is there a fix for CVE-2026-77252?

A patch was published on 2026-07-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-77252 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-77252?

Check whether you run Sooperset Mcp-Atlassian at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-77252: MCP Atlassian authorization bypass in projects and spaces filter

CVE-2026-77252 · Severity: medium · CVSS 6.5 · Published 2026-09-22

MCP Atlassian is a server that integrates Atlassian products (Confluence and Jira) with AI assistants via the Model Context Protocol. An attacker can bypass administrator-configured restrictions on which projects or spaces are searchable, allowing them to access projects or spaces outside the intended boundary if their supplied credentials have access to them. This could lead to unauthorized data exposure or information disclosure.

Technologies: Sooperset Mcp-Atlassian. Vendors: Sooperset.

Quick answers

Is CVE-2026-77252 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-77252 being exploited in the wild.
How severe is CVE-2026-77252?: Medium severity, with a CVSS score of 6.5, published 22 September 2026.
Which products and versions are affected?: Sooperset Mcp-Atlassian prior to 0.22.0.
Is there a fix for CVE-2026-77252?: A patch was published on 2026-07-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-77252 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-77252?: Check whether you run Sooperset Mcp-Atlassian at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an authorization bypass in versions prior to 0.22.0 where caller-supplied projects_filter and spaces_filter arguments replace administrator-configured allowlists (JIRA_PROJECTS_FILTER, CONFLUENCE_SPACES_FILTER), and caller-provided project or space clauses can suppress configured restrictions. The issue exists in SearchMixin.search_issues and SearchMixin.search code paths and affects any caller who can invoke the vulnerable search entry points with network access to the MCP server; the fix applies hard boundary logic where configured filters always AND into queries and tool arguments can only narrow, never replace, the allowlist.

Affected products

sooperset mcp-atlassian prior to 0.22.0

Timeline

2026-09-22: disclosed
2026-07-10: patched

References

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