# CVE-2026-72782

## Summary

- **CVE ID:** CVE-2026-72782
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-668
- **Published:** Aug 11, 2026
- **Last Modified:** Aug 11, 2026

## Description

Craft CMS versions >= 5.0.0-RC1 before 5.10.6 and >= 4.0.0-RC1 before 4.18.2 interpolate environment variables and secrets (via ${ENV_VAR} strings in the elementId parameter) into Twig templates before rendering, even when the Twig sandbox is enabled. An authenticated attacker with control panel access can render a malicious sandboxed Twig template and, using a blind error-based technique across many requests, incrementally leak arbitrary environment variables and secrets. These can be abused to forge sessions (via CRAFT_SECURITY_KEY), escalate privileges, and steal database, SMTP, API, or blob storage credentials. Fixed in 5.10.6 and 4.18.2.

## Affected Products

- craftcms — cms (5.0.0-RC1)
- craftcms — cms (5.10.6)
- craftcms — cms (4.0.0-RC1)
- craftcms — cms (4.18.2)

## References

- [CNA](https://github.com/craftcms/cms/security/advisories/GHSA-596p-6jv8-775v)
- [CNA](https://www.vulncheck.com/advisories/craft-cms-rc1-before-environment-variable-leak)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.23%
- **EPSS Percentile:** 13.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._