Answer in brief
CVE-2026-72782 records a Medium severity (CVSS 6.5) vulnerability in Craft CMS 5.0.0-RC1 before 5.10.6 Environment Variable Leak. The current sources do not mark it as known exploited. The current feed maps craftcms/cms (composer), craftcms/cms (composer), craftcms/cms (generic), craftcms/cms (generic) and additional mapped packages. 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 6.5. 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 craftcms/cms (composer), craftcms/cms (composer), craftcms/cms (generic), craftcms/cms (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| craftcms/cmscomposer | >=4.0.0-RC1,<4.18.2 | 4.18.2 |
| craftcms/cmscomposer | >=5.0.0-RC1,<5.10.6 | 5.10.6 |
| craftcms/cmsgeneric | >=5.0.0-RC1 <5.10.6 | 5.10.6 |
| craftcms/cmsgeneric | >=4.0.0-RC1 <4.18.2 | 4.18.2 |
| craftcms/cmspackagist | >=5.0.0-RC1 <5.10.6 | 5.10.6 |
| craftcms/cmspackagist | >=4.0.0-RC1 <4.18.2 | 4.18.2 |
Published upstream
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.