Vulnerability · Published Oct 22, 2026 · Assigned by drupal
CVE-2026-84915Component blocks - Moderately critical - Cross site scripting - SA-CONTRIB-2026-123
Medium 4.6
In plain English
A medium-severity cross-site scripting in Component blocks from Drupal. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.6Medium
Exploit odds (30 days)0.2%top 89.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Component blocks allows Stored XSS. This issue affects Component blocks versions: from 0.0.0 to 1.2.7.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist:https://packages.drupal.org/8 | drupal/component_blocks | 1.2.7 | DRUPAL-CONTRIB-2026-123 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Drupal | Component blocks | 0.0.0 – before 1.2.7 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N