# CVE-2026-124503: sooperset mcp-atlassian path traversal in validate_safe_path

Source: https://junglewise.ai/threats/cve-2026-124503-a-vulnerability-was-identified-in-sooperset-mcp-atlassian-up-to  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-124503 · Severity: medium · CVSS 4.3 · Published 2026-11-10

sooperset mcp-atlassian is an MCP server that integrates with Atlassian tools like Confluence and Jira. A path traversal vulnerability in the validate_safe_path function allows attackers to read arbitrary files from the server's filesystem by manipulating file path arguments. An attacker can exploit this remotely to exfiltrate sensitive data or overwrite files.

Technologies: [Sooperset Mcp-Atlassian](https://junglewise.ai/threats/technologies/sooperset-mcp-atlassian). Vendors: [Sooperset](https://junglewise.ai/threats/vendors/sooperset).

## Quick answers

**Is CVE-2026-124503 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124503 being exploited in the wild.

**How severe is CVE-2026-124503?** Medium severity, with a CVSS score of 4.3, published 10 November 2026.

**Which products and versions are affected?** Sooperset Mcp-Atlassian up to 0.24.0.

**Is there a fix for CVE-2026-124503?** Yes: fixed in 0.24.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-124503 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-124503?** Check whether you run Sooperset Mcp-Atlassian at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 0.24.1

## Technical details

A path traversal vulnerability exists in the validate_safe_path function of src/mcp_atlassian/utils/io.py, where inadequate path validation on the path argument allows directory traversal attacks. The vulnerability affects file upload and download operations in both Jira and Confluence integrations. An attacker can supply paths with ../ sequences or absolute paths to read files outside the intended working directory, gaining unauthorized file access without authentication.

## Affected products

- sooperset mcp-atlassian up to 0.24.0

## Timeline

- 2026-11-10: disclosed
- 2026-07-10: patched: Fix merged in PR #1448

## References

- [https://github.com/sooperset/mcp-atlassian/](https://github.com/sooperset/mcp-atlassian/)
- [https://github.com/sooperset/mcp-atlassian/pull/1448](https://github.com/sooperset/mcp-atlassian/pull/1448)

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