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CVE-2026-55808

Drupal core - Moderately critical - Improper validation - SA-CORE-2026-009

Medium5.4EPSS 0.27%
Published
Updated
Reserved
Assigned by
drupal

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.*.

Scores

CVSS scores of CVE-2026-55808, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Medium5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVDNVD · Analyzed3.1Medium5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS (exploitation in 30 days)
0.27% · top 80% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.

Weakness

Affected products

  • Drupal · Drupal core

    • affected 0.0.0 – < 10.5.12
    • affected 10.6.0 – < 10.6.11
    • affected 11.2.0 – < 11.2.14
    • affected 11.3.0 – < 11.3.12
    • affected 0.0.0 – < 11.0.*
    • affected 0.0.0 – < 11.1.*

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .