CVE-2026-49988Public exploit

Local file disclosure via unscanned attached outputs

Published Jul 15, 2026 · Updated Jul 15, 2026

Information disclosure in Repomix before 1.14.1 allows local users with MCP tool access to read supported local files. The attach_packed_output tool accepts .json, .txt, .md, and .xml paths based on extension, registers each path under an output ID, and read_repomix_output returns the content without runSecretLint(). Exploitation requires MCP tool-call capability against a server with local filesystem access and exposes file contents without writing files or executing commands.

CVSS severity6.9
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Repomix before 1.14.1 allows local users with MCP tool access to read supported local files. The attach_packed_output tool accepts .json, .txt, .md, and .xml paths based on extension, registers each path under an output ID, and read_repomix_output returns the content without runSecretLint(). Exploitation requires MCP tool-call capability against a server with local filesystem access and exposes file contents without writing files or executing commands.

The record

CVE
CVE-2026-49988
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
yamadashy
Product
Repomix
Classifications
CWE-200, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=< 1.14.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

yamadashy · Repomixversion=< 1.14.1

Published CVSS scores

6.9GitHub, Inc.CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 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-200Exposure of Sensitive Information to an Unauthorized Actor
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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