Veille CVE

‹ Retour à la liste

CVE-2026-77256

6.5 Moyenne

Publiée le 22/09/2026 à 21:16 · Modifiée le 28/09/2026 à 15:18 · Analysée par le NVD · Source : security-advisories@github.com

Description

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the plaintext OAuth fallback file containing refresh and access tokens is written with permissions inherited from the process umask. Under common or permissive configurations, other local users can read the backup and retain Atlassian access through the refresh token. The advisory traces the vulnerable input and processing flow through OAuthConfig._save_tokens_to_file, refresh_token, access_token, and umask, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

Traduire en français

Produits concernés

Scores CVSS

VersionScoreSourceVecteur
4.0 8.3 Élevée security-advisories@github.com CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
3.1 6.5 Moyenne nvd@nist.gov (NVD) CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Faiblesses (CWE)

Références

Ailleurs