CVE-2026-14702Public exploit

Local file disclosure and overwrite via predictable paths

Published Jul 5, 2026 · Updated Jul 5, 2026

Predictable temporary-file creation in Zach Caceres Markdownify MCP Server 1.0 and 1.1.0 allows local users to read fetched content. The saveToTempFile function builds names from Date.now() in the shared OS temporary directory, then fs.writeFileSync follows pre-existing symbolic links. Exploitation requires low-privileged local access to predict or spray the timestamp window and pre-create a link, enabling content capture or writes to files already writable by the server process.

CVSS severity2.5
Low
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable temporary-file creation in Zach Caceres Markdownify MCP Server 1.0 and 1.1.0 allows local users to read fetched content. The saveToTempFile function builds names from Date.now() in the shared OS temporary directory, then fs.writeFileSync follows pre-existing symbolic links. Exploitation requires low-privileged local access to predict or spray the timestamp window and pre-create a link, enabling content capture or writes to files already writable by the server process.

The record

CVE
CVE-2026-14702
Published
Jul 5, 2026
Updated
Jul 5, 2026
Vendor
Zach Caceres
Product
Markdownify MCP Server
Classifications
CWE-310, CWE-330, T1005, T1565.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 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=1.0
  2. Affected versionversion=1.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zach Caceres · Markdownify MCP Serverversion=1.0; version=1.1.0

Published CVSS scores

2.5VulDBCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
1.1VulDBCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
1.0VulDBAV:L/AC:H/Au:S/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

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

Weakness, pattern, technique

CWE-310Cryptographic Issues
CWE-330Use of Insufficiently Random Values
T1005Data from Local System
T1565.001Stored Data Manipulation

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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