CVE-2026-27826

Katalog CVE

CVSS 8.2 · High EPSS 1,0%

Kerentanan Server-Side Request Forgery (SSRF) pada sooperset mcp atlassian. Skor CVSS 3.1 8.2 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

10 Maret 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

8.2 (High), sumber NVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-918: Server-Side Request Forgery (SSRF)

EPSS (30 hari)

1,0% peluang dieksploitasi; lebih tinggi dari 63,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-7r34-79r5-rcc9 exploit · advisory vendor
• https://github.com/sooperset/mcp-atlassian/commit/5cd697dfce9116ef330b8dc7a91291640e0528d9 patch