Incomplete Blacklist Affecting langfuse-4-worker package, versions <4.56.0-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.41% (34th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LANGFUSE4WORKER-20812110
  • published11 Oct 2026
  • disclosed6 Oct 2026

Introduced: 6 Oct 2026

NewCVE-2026-106445  (opens in a new tab)
CWE-184  (opens in a new tab)
CWE-1289  (opens in a new tab)

How to fix?

Upgrade Minimos:latest langfuse-4-worker to version 4.56.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream langfuse-4-worker package and not the langfuse-4-worker package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

Handlebars provides the power necessary to let users build semantic templates. From 3.0.0 until 4.7.10, Handlebars lookupProperty returns Function.prototype.constructor before applying the prototype-access deny list because constructor is an own property of Function.prototype. When an attacker can render a controlled template with allowProtoMethodsByDefault enabled and an accessible function in the template context, the template can traverse from that function through its prototype to Function.prototype and then obtain the Function constructor through the own-property bypass. This permits attacker-controlled JavaScript to execute with the server application's privileges. This issue is fixed in version 4.7.10.

CVSS Base Scores

version 3.1