CVE-2026-30633Public exploit

File read and write via traversable paths

Published Jul 21, 2026 · Updated Jul 21, 2026

Path traversal in knowns-dev Knowns 0.11.4 allows attackers to read or modify files through crafted MCP document paths. The get_doc and update_doc tools resolve caller-controlled path values without confining the result to .knowns/docs before reading or writing Markdown files. Access to the affected MCP server tools is required, and traversal is limited to files accepted by their document-path handling.

CVSS severityUnavailable
Unscored
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in knowns-dev Knowns 0.11.4 allows attackers to read or modify files through crafted MCP document paths. The get_doc and update_doc tools resolve caller-controlled path values without confining the result to .knowns/docs before reading or writing Markdown files. Access to the affected MCP server tools is required, and traversal is limited to files accepted by their document-path handling.

The record

CVE
CVE-2026-30633
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1005
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

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

Weakness, pattern, technique

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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