CVE-2026-77244

Katalog CVE

CVSS 10.0 · Critical EPSS 0,29%

Kerentanan Improper Authentication pada mcp-atlassian mcp atlassian. Skor CVSS 3.1 10.0 (Critical) 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 HTTP transport accepts requests without a verified user identity and downstream fetcher construction falls back to the operator's globally configured Jira or Confluence credentials. A network client that can reach the MCP endpoint can invoke Atlassian tools as the operator, including read and write operations available to that account. The advisory traces the vulnerable input and processing flow through UserTokenMiddleware, AtlassianOpaqueTokenVerifier, _get_fetcher, and streamable-http, 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

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

Jenis kelemahan (CWE)

CWE-287: Improper Authentication
CWE-303: Incorrect Implementation of Authentication Algorithm
CWE-862: Missing Authorization

EPSS (30 hari)

0,29% peluang dieksploitasi; lebih tinggi dari 19,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-wrhw-j3f9-8vc6 exploit · advisory vendor
• https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460 patch
• https://github.com/sooperset/mcp-atlassian/pull/1448 patch
• https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0 release notes