CVE-2026-77255

Katalog CVE

CVSS 8.6 · High EPSS 0,41%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada mcp-atlassian mcp atlassian. Skor CVSS 3.1 8.6 (High) menurut github.com.

Deskripsi (NVD)

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the Jira update_issue attachments argument is converted into local paths and routed to the attachment upload implementation without workspace validation. A caller can make the MCP server read arbitrary local files and attach them to a Jira issue, using the server as a confused deputy to exfiltrate the contents. The advisory traces the vulnerable input and processing flow through jira update_issue, attachments, upload_attachment, and file_path, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

Rincian

Terbit di NVD

22 September 2026

Terakhir diubah

29 September 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')

EPSS (30 hari)

0,41% peluang dieksploitasi; lebih tinggi dari 33,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-2xj6-xx86-cwwc exploit · advisory vendor
• https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460 patch
• https://github.com/sooperset/mcp-atlassian/pull/1448 issue tracking · patch
• https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0 release notes