CVE-2026-77268

Katalog CVE

CVSS 5.5 · Medium EPSS 0,12%

Kerentanan Incorrect Permission Assignment for Critical Resource pada mcp-atlassian mcp atlassian. Skor CVSS 3.1 5.5 (Medium) 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 OAuth fallback token directory and JSON file are created without explicit owner-only modes. Local users or processes with access through the resulting group or world permission bits can read access and refresh tokens and reuse the associated Atlassian session. The advisory traces the vulnerable input and processing flow through ~/.mcp-atlassian, oauth-<client_id>.json, access_token, and refresh_token, 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

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

Jenis kelemahan (CWE)

CWE-732: Incorrect Permission Assignment for Critical Resource

EPSS (30 hari)

0,12% peluang dieksploitasi; lebih tinggi dari 1,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-4596-2p6p-28cv exploit · mitigasi · 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