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PatchSiren cyber security CVE debrief

CVE-2026-16647 Drupal CVE debrief

CVE-2026-16647 is an Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal Disable Login Page. The issue affects Disable Login Page versions from 0.0.0 to 1.1.4. According to the CVE Program and NVD, the vulnerability has a CVSS score of 4.1 and is classified as MEDIUM severity. This vulnerability allows for authentication bypass using an alternate path or channel, potentially leading to unauthorized access. Drupal site administrators and security teams should assess exposure and potential impact, especially if using Disable Login Page versions 0.0.0 to 1.1.4. Verification of exposure is required to determine potential impact on Drupal installations. Def

Vendor
Drupal
Product
Disable Login Page
CVSS
MEDIUM 4.1
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

Drupal site administrators and security teams should assess exposure and potential impact, especially if using Disable Login Page versions 0.0.0 to 1.1.4.

Why it matters

CVE-2026-16647 is a MEDIUM-severity vulnerability in Drupal Disable Login Page that requires verification of exposure and potential impact, especially for versions 0.0.0 to 1.1.4.

  • Verification of exposure is required to determine potential impact on Drupal installations.
  • Assessing and mitigating this vulnerability can help prevent unauthorized access.

Technical summary

The vulnerability, CVE-2026-16647, allows for authentication bypass using an alternate path or channel in Drupal's Disable Login Page module, affecting versions from 0.0.0 to 1.1.4. This issue has a CVSS score of 4.1 and is classified as MEDIUM severity.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact on Drupal installations using Disable Login Page, especially if versions 0.0.0 to 1.1.4 are in use.

Recommended defensive actions

  • Verify if Disable Login Page versions 0.0.0 to 1.1.4 are in use and assess potential exposure.
  • Review Drupal security advisories and CVE details for additional context.
  • Consider updating to a version beyond 1.1.4 if available.

Evidence notes

The CVE Program and NVD provide official records of the vulnerability, but details on exploitation or specific impacts are limited. The Drupal security advisory (SA-CONTRIB-2026-111) may offer additional context.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-16647 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-16647

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

  • CVE-2026-16647 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-16647

    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.