Project Subscriptions
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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-7r34-79r5-rcc9 | MCP Atlassian has SSRF via unvalidated X-Atlassian-Jira-Url / X-Atlassian-Confluence-Url headers |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Tue, 10 Mar 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 10 Mar 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to version 0.17.0, an unauthenticated attacker who can reach the mcp-atlassian HTTP endpoint can force the server process to make outbound HTTP requests to an arbitrary attacker-controlled URL by supplying two custom HTTP headers without an `Authorization` header. No authentication is required. The vulnerability exists in the HTTP middleware and dependency injection layer — not in any MCP tool handler - making it invisible to tool-level code analysis. In cloud deployments, this could enable theft of IAM role credentials via the instance metadata endpoint (`169[.]254[.]169[.]254`). In any HTTP deployment it enables internal network reconnaissance and injection of attacker-controlled content into LLM tool results. Version 0.17.0 fixes the issue. | |
| Title | MCP Atlassian has SSRF via unvalidated X-Atlassian-Jira-Url / X-Atlassian-Confluence-Url headers | |
| Weaknesses | CWE-918 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-10T19:15:10.505Z
Reserved: 2026-02-24T02:32:39.799Z
Link: CVE-2026-27826
Updated: 2026-03-10T19:15:08.025Z
Status : Received
Published: 2026-03-10T19:17:20.670
Modified: 2026-03-10T19:17:20.670
Link: CVE-2026-27826
No data.
OpenCVE Enrichment
No data.
Github GHSA