CVE-2026-77261
7.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
Summary
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, _make_ssrf_safe_hook is omitted from JiraFetcher and ConfluenceFetcher sessions created through the basic-auth and oauth_pat branches. If an attacker-controlled or compromised configured Atlassian instance returns a redirect to an internal address, those sessions can follow the redirect without revalidating its destination. This issue is fixed in version 0.22.0.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| sooperset | mcp-atlassian | < 0.22.0 | affected |
Weaknesses
- CWE-918: CWE-918: Server-Side Request Forgery (SSRF)
References
- https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-6529-c226-h328
- https://github.com/sooperset/mcp-atlassian/pull/1448
- https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460
- https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0
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