CVE-2026-7403Public exploitNetwork attack vector

Arbitrary file read via unchecked rule path

Published Apr 29, 2026 · Updated Apr 29, 2026

Path traversal in Gel Data gel-mcp 0.1.0 allows remote attackers to read local files through the fetch_rule MCP tool. fetch_rule joins the caller-controlled rule_name directly beneath RULES_DIR, checks only that the resulting path exists, and returns read_text() without validating containment. Exploitation requires access to the MCP tool and exposes only files readable by the gel-mcp service account; no file-write capability is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Path traversal in Gel Data gel-mcp 0.1.0 allows remote attackers to read local files through the fetch_rule MCP tool. fetch_rule joins the caller-controlled rule_name directly beneath RULES_DIR, checks only that the resulting path exists, and returns read_text() without validating containment. Exploitation requires access to the MCP tool and exposes only files readable by the gel-mcp service account; no file-write capability is reported.

The record

CVE
CVE-2026-7403
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
Gel Data
Product
gel-mcp
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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=0.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gel Data · gel-mcpversion=0.1.0

Published CVSS scores

5.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
5.0VulDB CNAAV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR
5.5VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
5.3VulDB CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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