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CWE-69

Improper Handling of Windows ::DATA Alternate Data Stream

VariantIncompleteSimple3 CVEs
The product does not properly prevent access to, or detect usage of, alternate data streams (ADS).

Extended description

An attacker can use an ADS to hide information about a file (e.g. size, the name of the process) from a system or file browser tools such as Windows Explorer and 'dir' at the command line utility. Alternately, the attacker might be able to bypass intended access restrictions for the associated data fork.

Common consequences1

  • Access ControlNon-RepudiationOtherBypass Protection MechanismHide ActivitiesOther

Potential mitigations1

  1. Implementation

    Ensure that the source code correctly parses the filename to read or write to the correct stream.

Relationships1

CVEs referencing this CWE3

CVEDescriptionSeverityEPSSFlagsModified
CVE-2024-43033

JPress through 5.1.1 on Windows has an arbitrary file upload vulnerability that could cause arbitrary code execution via ::$DATA to AttachmentController, such as a .jsp::$DATA file to io.jpress.web.commons.controller.AttachmentController#upload. NOTE: this is unrelated to the attack vector for CVE-2024-32358.

HIGH8.8
0.98%p60
2026-06-17
CVE-2025-3941

Improper Handling of Windows ::DATA Alternate Data Stream vulnerability in Tridium Niagara Framework on Windows, Tridium Niagara Enterprise Security on Windows allows Input Data Manipulation. This issue affects Niagara Framework: before 4.14.2, before 4.15.1, before 4.10.11; Niagara Enterprise Security: before 4.14.2, before 4.15.1, before 4.10.11.Tridium recommends upgrading to Niagara Framework and Enterprise Security versions 4.14.2u2, 4.15.u1, or 4.10u.11.

CRITICAL9.8
0.50%p40
2026-06-17
CVE-2026-52792

Algernon is a small self-contained pure-Go web server. Prior to 1.17.9, Algernon on Windows selects a file handler in engine/handlers.go by calling filepath.Ext() without first rejecting NTFS-equivalent names such as x.lua::$DATA, x.lua., and x.lua . An unauthenticated client can append one of these suffixes to a public server-side script using the .lua, .tl, .po2, .amber, or .frm extension. The request path passes through URL2filename in utils/files.go, skips the renderer and execution cases, and reaches FilePage, os.Open, ReadAndLogErrors, and ToClient, while NTFS resolves the alias to the underlying script. The server consequently returns raw script source and can expose database credentials, API keys, and the SetCookieSecret value, which may permit forged session cookies. Linux and macOS hosts are not affected by this issue. This issue is fixed in version 1.17.9.

NONE
0.43%p36
2026-08-19