Medium severity · published Jul 10, 2026
CVE-2026-55808
Drupal core - Moderately critical - Improper validation - SA-CORE-2026-009
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS). This issue affects Drupal core versions: from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, from 11.3.0 to 11.3.12, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DR
Drupal · Drupal
0.0.0 before 10.5.12; 10.6.0 before 10.6.11; 11.2.0 before 11.2.14; 11.3.0 before 11.3.12; 0.0.0 before 11.0.*; 0.0.0 before 11.1.* · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55808
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55808
Vendor Advisory
https://www.drupal.org/sa-core-2026-009
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