CVE-2026-77257

EPSS 0.41%
Veröffentlicht 22.09.2026 18:08:48
Zuletzt bearbeitet 29.09.2026 18:59:42
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MCP Atlassian: HTTP upload tools accept arbitrary server-local file paths

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, HTTP-exposed Jira and Confluence upload tools pass a caller-provided file_path to local file operations without restricting it to the workspace. A remote MCP caller with tool access can cause the server to read sensitive local files and upload them as Atlassian attachments. The advisory traces the vulnerable input and processing flow through streamable-http, upload_attachment, and file_path, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

Betroffene Produkte Warnungen 0 Metriken 3 CWE 1 Referenzen 7

NVD 1 VulnDex Vulnerability Enrichment 3

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Mcp-atlassian ≫ Mcp Atlassian Version < 0.22.0

VulnDex Vulnerability Enrichment

Diese Information steht angemeldeten Benutzern zur Verfügung.

Zu dieser CVE wurde keine Warnung gefunden.

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	0.41%	0.319

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
NIST	6.5	2.8	3.6	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
security-advisories@github.com	8.3	0	0	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

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

https://github.com/sooperset/mcp-atlassian/pull/1448

Patch

Issue Tracking

https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460

Patch

https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0

Release Notes

https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-mrq8-fv7v-hhjg

Vendor Advisory

Mitigation

https://nvd.nist.gov/vuln/detail/CVE-2026-77257

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2026-77257

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2026-77257

EUVD

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CVE-2026-77257