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archive/Patch now/AIR-2026-0075
closedclosed 12 Aug 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-73498: Path traversal flaw in MCP Atlassian server allows arbitrary file read

MCP Atlassian

The MCP Atlassian server prior to version 0.22.0 lacks safe path validation in attachment uploads, enabling authenticated clients or induced AI agents to read and exfiltrate arbitrary files. This can lead to the exposure of sensitive server environment variables.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
7.7
EPSS
<0.01 · top 58% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
12 Aug 2026
last update
12 Aug 2026
CVE ids
CVE-2026-73498other records

Timeline · 1

  1. 12 Aug 2026CVE-2026-73498: MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira).

Sources · 1

Advisories and databases

  1. 2026-08-12
    CVE-2026-73498: MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira).
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-73498

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerabilityAgent hijack
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling, Enterprise deployment
owasp llm top 10
LLM03:2025 Supply ChainLLM06:2025 Excessive Agency
mitre atlas
AML.T0053 AI Agent Tool Invocation
tags
mcppath-traversalatlassian
dates
happened 12 Aug 2026 · first reported 12 Aug 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-73498: Path traversal flaw in MCP Atlassian server allows arbitrary file read

https://gcdradar.vercel.app/incidents/cve-2026-73498-path-traversal-flaw-in-mcp-atlassian-server-a · AIR-2026-0075 · closed 2026-08-12

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-08-12
- AI role: Attack on AI
- Products: MCP Atlassian
- CVE ids: CVE-2026-73498
- CVSS: 7.7

## Summary

The MCP Atlassian server prior to version 0.22.0 lacks safe path validation in attachment uploads, enabling authenticated clients or induced AI agents to read and exfiltrate arbitrary files. This can lead to the exposure of sensitive server environment variables.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-08-12: CVE-2026-73498: MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). (https://nvd.nist.gov/vuln/detail/CVE-2026-73498)

## Sources

- 2026-08-12 NVD: CVE-2026-73498: MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). https://nvd.nist.gov/vuln/detail/CVE-2026-73498

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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