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TI-2026-79077 Aliases CVE-2026-84918GHSA-jmjm-hhfc-mfxc

Improper signature verification in Drupal Monobank payment API

Priority LOW 17CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-347.

Summary

The Monobank payment API module for Drupal, versions from 0.0.0 before 1.0.3, does not properly verify cryptographic signatures (CWE-347). This lets an attacker spoof a signature. The CVSS vector shows a remote attacker needs no privileges or user interaction, and the impact is a low integrity loss.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Improper Verification of Cryptographic Signature vulnerability in Drupal Monobank payment API allows Signature Spoof. This issue affects Monobank payment API versions: from 0.0.0 to 1.0.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00157 4th percentileScored 2026-11-07
Fix Fixed Monobank payment API (Drupal): 1.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DrupalMonobank payment API0.0.0 to before 1.0.31.0.3Patch availableCNA
  • Monobank payment API VendorDrupal Affected 0.0.0 to before 1.0.3 Fixed in 1.0.3 Patch available CNA

Remediation

Update Monobank payment API to version 1.0.3, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Monobank payment API (Drupal) Fixed in 1.0.3

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-84918
  2. 2026-10-22 Alias added: GHSA-jmjm-hhfc-mfxc
  3. 2026-10-22 CVSS score added · CISA ADP
  4. 2026-10-22 CISA SSVC decision points changed

References

Other 1

  • TI-2026-07979 Drupal core - Highly critical - SQL injection - SA-CORE-2026-004 KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-05494 Drupal core - Highly critical - Remote Code Execution - SA-CORE-2018-004 KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-05493 Improper input validation in Drupal before 7.58, 8.x before 8.3.9, 8.4.x before 8.4.6… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-10731 Unrestricted file upload in Drupal Core KEVCVSS 3.1HIGH 8.8
  • TI-2019-04505 Drupal core - Highly critical - Remote Code Execution KEVCVSS 3.1HIGH 8.1
  • TI-2020-17477 Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks… KEVCVSS 3.1HIGH 7.8
See all 941 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences