SS-2026-006: SS-2026-006 - RCE via template string escaping in userforms email subject

unknown Affects silverstripe/userforms. Feed 2026.11.09.1, updated 2026-11-08.

SS-2026-006 - RCE via template string escaping in userforms email subject

Package: silverstripe/userforms Composer
Affected versions: <6.4.10 or >=7.0.0 and <7.1.4
Fixed in: 6.4.10, 7.1.4
Severity: unknown
Exploitation: not on CISA KEV
Source: friendsofphp

References

https://www.silverstripe.org/download/security-releases/ss-2026-006

NVD record silverstripe/userforms advisories

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# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
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Related advisories

CVE-2020-9280 high SilverStripe Folders migrated from 3.x may be unsafe to upload to same package: silverstripe/userforms
CVE-2026-54721 high silverstripe/userforms vulnerable to remote code execution via userforms email subject same package: silverstripe/userforms
GHSA-55pp-293f-3365 medium silverstripe/userforms file upload exposure on UserForms module same package: silverstripe/userforms
CVE-2026-88991 unknown CVE-2026-88991 - RCE in email subject field via template execution same package: silverstripe/userforms
CVE-2026-88992 unknown CVE-2026-88992 - Userforms CSV export restricted file access same package: silverstripe/userforms
CVE-2026-91111 unknown CVE-2026-91111 - Uploaded XML XSS same package: silverstripe/userforms