Improper Handling of Windows DATA Alternate Data Stream Affecting github.com/xyproto/algernon/engine package, versions <1.17.9


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.43% (36th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-GOLANG-GITHUBCOMXYPROTOALGERNONENGINE-17809956
  • published3 Jul 2026
  • disclosed2 Jul 2026
  • creditUnknown

Introduced: 2 Jul 2026

CVE-2026-52792  (opens in a new tab)
CWE-69  (opens in a new tab)

How to fix?

Upgrade github.com/xyproto/algernon/engine to version 1.17.9 or higher.

Overview

Affected versions of this package are vulnerable to Improper Handling of Windows DATA Alternate Data Stream in the FilePage process on Windows systems when handling filenames with NTFS-equivalent suffixes such as ::$DATA, a trailing dot, or a trailing space. An attacker can obtain the raw source code of server-side scripts, potentially exposing embedded secrets and credentials, by appending these suffixes to public script paths and sending crafted HTTP requests. This is only exploitable if the application is running on a Windows host, serves at least one server-side script on a public path, and either no authentication backend is configured or the script is otherwise accessible without authentication.

CVSS Base Scores

version 4.0
version 3.1