CVE-2026-55803
An attacker can exploit multiple vulnerabilities in Drupal Core to execute arbitrary code, conduct cross-site scripting attacks, manipulate data, or redirect users to malicious websites.
CSIRTS triage
- What
- Multiple vulnerabilities in Drupal Core allow an attacker to execute arbitrary code, conduct cross-site scripting attacks, manipulate data, or redirect users to malicious websites.
- Who is affected
- Deployments of Drupal Core are affected by these vulnerabilities.
- Urgency
- Remediation is urgent due to the critical severity and confirmed exploitation of these vulnerabilities.
- Action
- Apply the latest security updates provided by Drupal.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all EPSS-scored CVEs.
Advisory coverage (4)
- critical[UPDATE] [critical] Drupal Core: Multiple vulnerabilitiescert-bund · 2026-07-13
- mediumCVE-2026-55803: Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability i…nvd · 2026-07-10
- unknownDrupal Multiple Vulnerabilitieshkcert · 2026-06-23
- criticalDrupal core - Critical - PHP object injection - SA-CORE-2026-005drupal · 2026-06-17
External references
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[](https://www.csirts.com/cve/CVE-2026-55803)