CVE-2026-44266

Elo is a purely functional expression language for no-code tools. Prior to 1.0.1, the Ruby backend in…

CVSS 3.1 · [email protected] · Secondary 9.8 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 3 Nov 2026 18:59:38 UTC. Read the latest advisory.

nvd · CVE-2026-44266

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

nvd · CVE-2026-44266

Published

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…

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Received

Weakness classifications: CWE-94 · CWE-116 · CWE-1336

Original publisher date fields

published: 2026-11-03T18:18:02.957

lastModified: 2026-11-03T18:18:02.957

Source published: 3 Nov 2026 18:18:02 UTC
Source modified: 3 Nov 2026 18:18:02 UTC
Saved here: 3 Nov 2026 18:59:38 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · [email protected] · Secondary · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H