CVE-2026-39847Network attack vector

Arbitrary file read via asset path traversal

Published Apr 7, 2026 · Updated Apr 7, 2026

Path traversal in Emmett 2.5.0 through 2.8.0 allows remote attackers to read arbitrary server files via internal asset requests. The RSGI static handler joins the /emmett request suffix to its assets directory without neutralizing ../ path elements, so resolution escapes that directory. No authentication or user interaction is required, and exposed files are read without any reported ability to modify them.

CVSS severity9.1
Critical
EPSS probability0.50%
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 Emmett 2.5.0 through 2.8.0 allows remote attackers to read arbitrary server files via internal asset requests. The RSGI static handler joins the /emmett request suffix to its assets directory without neutralizing ../ path elements, so resolution escapes that directory. No authentication or user interaction is required, and exposed files are read without any reported ability to modify them.

The record

CVE
CVE-2026-39847
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
Emmett Framework
Product
Emmett
Classifications
CWE-22, T1005, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 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=>= 2.5.0, < 2.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Emmett Framework · Emmettversion=>= 2.5.0, < 2.8.1

Published CVSS scores

9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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