CVE-2026-73498Public exploitNetwork attack vectorHinoki check available

Arbitrary file read via unchecked attachment path

Published Aug 12, 2026 · Updated Aug 12, 2026

Path traversal in MCP Atlassian before 0.22.0 allows remote authenticated users to read server files through a Confluence upload. The confluence_upload_attachment tool passes client-supplied file_path to open() in _upload_attachment_direct() without validate_safe_path. Direct use requires MCP access, while an agent induced by untrusted content can upload any file readable by the server process, including credentials.

CVSS severity7.7
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in MCP Atlassian before 0.22.0 allows remote authenticated users to read server files through a Confluence upload. The confluence_upload_attachment tool passes client-supplied file_path to open() in _upload_attachment_direct() without validate_safe_path. Direct use requires MCP access, while an agent induced by untrusted content can upload any file readable by the server process, including credentials.

The record

CVE
CVE-2026-73498
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
sooperset
Product
MCP Atlassian
Classifications
CWE-22, T1005, T1567
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.22.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

sooperset · MCP Atlassianversion=< 0.22.0

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System
T1567Exfiltration Over Web Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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