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PatchSiren cyber security CVE debrief

CVE-2026-84918 Drupal CVE debrief

A vulnerability in the Monobank payment API for Drupal allows for signature spoofing due to improper verification of cryptographic signatures. This issue affects versions from 0.0.0 to 1.0.3 of the Monobank payment API. Drupal site administrators and security teams should assess exposure and prioritize verification and remediation efforts. The vulnerability could potentially compromise the authenticity of API requests and access to payment information. Site administrators should verify if their sites use affected versions of the Monobank payment API and update to version 1.0.3 or later if necessary.

Vendor
Drupal
Product
Monobank payment API
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-22
Original CVE updated
2026-10-22
Advisory published
2026-10-22
Advisory updated
2026-10-22

Who should care

Drupal site administrators and security teams should assess exposure and prioritize verification and remediation efforts. This includes verifying if the Monobank payment API is used on Drupal sites within the organization, checking the current version of the Monobank payment API, and updating to version 1.0.3 or later if necessary. Additionally, reviewing and monitoring API requests for suspicious activity is crucial

Why it matters

The vulnerability in the Monobank payment API for Drupal allows for signature spoofing, potentially compromising the authenticity of API requests and access to payment information. Drupal site administrators and security teams should assess exposure and prioritize verification and remediation efforts.

  • Verification of API request authenticity may be compromised
  • Potential for unauthorized access to payment information
  • Need for review of API implementation and security configurations

Technical summary

The Monobank payment API for Drupal is vulnerable to signature spoofing due to improper verification of cryptographic signatures. This issue affects versions from 0.0.0 to 1.0.3 of the Monobank payment API. The vulnerability allows for potential unauthorized access to payment information and could compromise the authenticity of API requests. Drupal site administrators and security teams should assess exposure and prioritize verification and remediation efforts.

Defensive priority

Drupal site administrators should verify if their sites use affected versions of the Monobank payment API and update to version 1.0.3 or later if necessary.

Recommended defensive actions

  • Verify if the Monobank payment API is used on Drupal sites within the organization
  • Check the current version of the Monobank payment API and update to 1.0.3 or later if necessary
  • Review and monitor API requests for suspicious activity

Evidence notes

The CVE record and source item provide details on the vulnerability and affected versions. However, additional information on exploitation or impact is not available.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-84918 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-84918

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

  • CVE-2026-84918 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-84918

    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.