Answer in brief
CVE-2026-44266 records a Critical severity (CVSS 9.8) vulnerability in Elo: Remote Code Execution in Elo Ruby backend via unescaped `#{...}` interpolation in emitted string literals and subtype-constraint labels. The current sources do not mark it as known exploited. The current feed maps enspirit/elo (generic), @enspirit/elo (npm), @enspirit/elo (npm), @enspirit/elo (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps enspirit/elo (generic), @enspirit/elo (npm), @enspirit/elo (npm), @enspirit/elo (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| enspirit/elogeneric | <1.0.1 | 1.0.1 |
| @enspirit/elonpm | <=1.0.0 | 1.0.1 |
| @enspirit/elonpm | >=0 <1.0.1 | 1.0.1 |
| @enspirit/elonpm | <=1.0.0 | 1.0.1 |
Published upstream
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.