DRUPAL-CONTRIB-2026-170
The advisory, in context
The Webform module allows site builders to create forms, collect submissions, and configure access to forms and submission data. Site builders may also configure handlers for processing submissions. Forms may be displayed in blocks.
Webform does not sufficiently validate an optional token query value before using it. Under specific configurations where a Webform is rendered for anonymous visitors, a malicious request can cause the request to consume significant resources leading to a Denial of Service.
Affected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
Earlier releases before 6.2.12
Fixed in 6.2.12
From 6.3.0 before 6.3.1
Fixed in 6.3.1
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.2.12"
}
],
"type": "ECOSYSTEM",
"database_specific": {
"constraint": "<6.2.12"
}
},
{
"events": [
{
"introduced": "6.3.0"
},
{
"fixed": "6.3.1"
}
],
"type": "ECOSYSTEM",
"database_specific": {
"constraint": ">=6.3.0 <6.3.1"
}
}
],
"versions": []
}