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CVE-2026-44266— Elo: Remote Code Execution in Elo Ruby backend via unescaped `#{...}` interpolation in emitted string literals and subtype-constraint labels

Quick assessment

Affected
enspirit elo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Elo 是一种专为无代码工具设计的纯函数式表达式语言。在 1.0.1 版本之前，位于 中的 Ruby 后端将攻击者可控的文本嵌入到 Ruby 的双引号字符串中，却未对 字符进行转义。这导致在字符串字面量生成器或带标签的子类型约束分支中，Ruby 插值表达式会被执行，从而允许任意 Ruby 代码运行。受影响的入口点包括：Ruby 目标的 沙盒环境、 命令，以及 解析后接 Ruby 代码生成的流程。当带标签的子类型约束失败时，其错误消息会被求值；而普通字符串字面量则在编译后的 Ruby 代码运行时被求值。攻击者可借此通

CVSS 9.8 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
enspirit elo < 1.0.1 affected
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I. Basic Information for CVE-2026-44266

Vulnerability Information
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Vulnerability Title
Elo: Remote Code Execution in Elo Ruby backend via unescaped `#{...}` interpolation in emitted string literals and subtype-constraint labels
Source: CVE Program / CVE List V5
Vulnerability Description
Elo is a purely functional expression language for no-code tools. Prior to 1.0.1, the Ruby backend in src/compilers/ruby.ts embeds attacker-controlled text in Ruby double-quoted strings without escaping #, so Ruby interpolation forms in the string-literal emitter or the labelled subtype-constraint branch become executable Ruby. The affected entry points include the /try playground with the Ruby target, bin/eloc -t ruby -x, and defaultFormats.elo.parse() followed by Ruby emission. A failing labelled subtype constraint evaluates its message, while an ordinary string literal is evaluated when the compiled Ruby runs, allowing Ruby code and shell command execution through backticks. JavaScript, Python, and SQL emission are not affected by this Ruby-specific path. This issue is fixed in version 1.0.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
enspirit elo < 1.0.1 -

II. Public POCs for CVE-2026-44266

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III. Intelligence Information for CVE-2026-44266

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Other References for CVE-2026-44266 (3)

Same Patch Batch · enspirit · 2026-11-03 · 3 CVEs total

CVE-2026-44267 9.8 CRITICAL Elo: Sandbox escape to arbitrary Node.js / browser code execution via unfiltered `.constru
CVE-2026-44265 7.4 HIGH Elo: Code injection in Elo backends via unvalidated emission of programmatic AST fields

IV. Related Vulnerabilities

Same product: elo
Same vendor: enspirit
Same weakness: CWE-94