CVE-2026-108515 Drupal CVE debrief

Who should care

Defenders responsible for Drupal core deployments, particularly those using versions between 8.9.0 and 10.6.19, 11.0.0 and 11.3.19, 11.4.0 and 11.4.10, and 12.0.0-alpha1 and 12.0.0-beta2, should assess exposure and apply patches.

Why it matters

The Drupal core Link module vulnerability can lead to XSS attacks, requiring defenders to verify exposure, apply patches, and monitor for potential attacks.

• Potential for cross-site scripting (XSS) attacks
• Need for verification of exposure and application of patches
• Possible impact on user interactions with affected Drupal core deployments

Technical summary

The Drupal core Link module provides a field type that can be used for internal and external URLs. The module does not sufficiently sanitize certain markup in some circumstances, which can lead to cross-site scripting (XSS) vulnerabilities. Affected versions include 8.9.0 to 10.6.19, 11.0.0 to 11.3.19, 11.4.0 to 11.4.10, and 12.0.0-alpha1 to 12.0.0-beta2.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Drupal core versions between 8.9.0 and 10.6.19, 11.0.0 and 11.3.19, 11.4.0 and 11.4.10, and 12.0.0-alpha1 and 12.0.0-beta2.

Recommended defensive actions

• Verify exposure of Drupal core installations to CVE-2026-108515
• Apply patches for affected Drupal core versions
• Monitor for potential XSS attacks
• Review and update inventory of Drupal core deployments

Evidence notes

The source corpus provides limited information about the vulnerability, including affected versions and a brief description. To verify exposure, defenders should review Drupal core installations, apply patches for affected versions, and monitor for potential XSS attacks. The evidence is limited to the provided source item and CVE record, and further verification is necessary to confirm affected scope and severity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.