CVE-2026-79773Network attack vectorHinoki check available

Authenticated file disclosure via unconstrained JavaScript includes

Published Aug 25, 2026 · Updated Aug 28, 2026

Path traversal in Winter CMS before 1.2.13 allows remote authenticated users to disclose server-readable files through JavaScript assets. JavascriptImporter resolves =include and =require targets with realpath() and inlines them without confirming that the resolved path remains inside an allowed asset root. An account with cms.manage_assets permission can expose application secrets at an unauthenticated combine URL, while the underlying file must be readable by the PHP process.

CVSS severity4.9
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Winter CMS before 1.2.13 allows remote authenticated users to disclose server-readable files through JavaScript assets. JavascriptImporter resolves =include and =require targets with realpath() and inlines them without confirming that the resolved path remains inside an allowed asset root. An account with cms.manage_assets permission can expose application secrets at an unauthenticated combine URL, while the underlying file must be readable by the PHP process.

The record

CVE
CVE-2026-79773
Published
Aug 25, 2026
Updated
Aug 28, 2026
Vendor
Winter CMS
Product
Winter CMS
Classifications
CWE-22, CWE-200, T1552.001, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.2.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Winter CMS · Winter CMSversion=0 <1.2.13

Published CVSS scores

4.9Winter CMS GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:H/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552.001Credentials In Files
T1005Data from Local System

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo