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PatchSiren cyber security CVE debrief

CVE-2026-18986 Entity Browser Project CVE debrief

A Cross-site Scripting (XSS) vulnerability exists in Entity Browser versions from 0.0.0 to 2.16.0 due to improper neutralization of input during web page generation. This issue allows stored XSS attacks. The vulnerability impacts Drupal installations using Entity Browser, allowing attackers to inject malicious scripts. Defenders should assess exposure and prioritize patching or mitigation to prevent potential attacks. The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 4.8 and affected versions of Entity Browser.

Vendor
Entity Browser Project
Product
Entity Browser
CVSS
MEDIUM 4.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-02
Original CVE updated
2026-09-08
Advisory published
2026-09-02
Advisory updated
2026-09-08

Who should care

Defenders responsible for Entity Browser installations, Drupal administrators, and security teams should assess exposure and prioritize patching or mitigation.

Why it matters

Defenders should care about CVE-2026-18986 because it allows stored XSS attacks in Entity Browser, impacting Drupal installations. Exposure verification and patching are crucial.

  • Potential for stored XSS attacks
  • Exposure of Entity Browser installations
  • Need for patching or mitigation

Technical summary

The Entity Browser module for Drupal has a stored Cross-Site Scripting (XSS) vulnerability. This issue affects Entity Browser versions from 0.0.0 to 2.16.0. The vulnerability allows attackers to inject malicious scripts, potentially leading to stored XSS attacks. Defenders should prioritize verifying exposure of Entity Browser installations and applying patches or mitigations to prevent XSS attacks.

Defensive priority

Defenders should prioritize verifying exposure of Entity Browser installations and applying patches or mitigations to prevent XSS attacks.

Recommended defensive actions

  • Verify Entity Browser installations for exposure
  • Apply patches or mitigations to prevent XSS attacks
  • Monitor for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 4.8 and affected versions of Entity Browser. The Entity Browser module for Drupal has a stored Cross-Site Scripting (XSS) vulnerability. Exposure verification and patching are crucial. Defenders should verify the presence of Entity Browser in their Drupal installations and apply patches or mitigations to prevent XSS attacks.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-18986 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-18986

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-18986 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-18986

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.