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TI-2026-82925 Aliases CVE-2026-118582GHSA-f93j-m756-g37x

Authentication bypass in Drupal CAPTCHA module

Priority LOW 37CWE-288Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-288.

Summary

Drupal CAPTCHA versions from 0.0.0 before 1.18.0 and from 2.0.0 before 2.0.11 are affected. An authentication bypass using an alternate path or channel (CWE-288) lets attackers bypass CAPTCHA functionality. An unauthenticated remote attacker can exploit this over the network with low complexity and no user interaction, and the impact is low confidentiality, integrity and availability.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal CAPTCHA allows Functionality Bypass. This issue affects CAPTCHA versions: from 0.0.0 to 1.18.0, from 2.0.0 to 2.0.11.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00229 13th percentileScored 2026-11-07
Fix Fixed CAPTCHA (Drupal): 1.18.0, 2.0.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
DrupalCAPTCHA0.0.0 to before 1.18.0; 2.0.0 to before 2.0.111.18.0, 2.0.11Patch availableCNA
  • CAPTCHA VendorDrupal Affected 0.0.0 to before 1.18.0; 2.0.0 to before 2.0.11 Fixed in 1.18.0, 2.0.11 Patch available CNA

Remediation

Upgrade Drupal CAPTCHA to version 1.18.0 or to version 2.0.11. Drupal security advisory SA-CONTRIB-2026-281 covers this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA CAPTCHA (Drupal) Fixed in 1.18.0, 2.0.11

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-118582
  2. 2026-10-30 Alias added: GHSA-f93j-m756-g37x
  3. 2026-11-06 CVSS score added · CISA ADP
  4. 2026-11-06 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

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