CVE-2026-77272: mcp-atlassian mcp atlassian

csirt@kutim:~/threat-intel/cve/CVE-2026-77272

CVSS 6.1 · Medium EPSS 0,25%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada mcp-atlassian mcp atlassian. Skor CVSS 3.1 6.1 (Medium) menurut NVD.

Deskripsi (NVD)

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the OAuth error query parameter is passed to CallbackHandler._send_response in oauth_setup.py and interpolated into an HTML page without escaping. A crafted authorization callback can inject markup or script that executes in the browser of a user completing the OAuth flow. This issue is fixed in version 0.22.0.

Rincian

Terbit di NVD: 22 September 2026
Terakhir diubah: 28 September 2026
Status NVD: Analyzed
CVSS 3.1: 6.1 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS (30 hari): 0,25% peluang dieksploitasi; lebih tinggi dari 14,8% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
mcp-atlassian	mcp atlassian	Semua versi sebelum 0.22.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-g2r2-3j32-j27x 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

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.