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TI-2026-86404 Aliases CVE-2026-105459GHSA-33f5-gwm5-4wrm

Improper signature check in IBM API Connect allows unauthorized access

Priority LOW 29CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

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

Summary

IBM API Connect from 10.0.8.0 through 10.0.8.12 and from 12.1.0.0 through 12.1.1.2 is affected. The product does not fully verify a cryptographic signature (CWE-347), so a token is accepted without a complete signature check. An unauthenticated remote attacker can use this to join an organization without a valid invitation and gain unauthorized access.

Written with Claude Haiku 5.5 from the sources below · 2026-11-08

Description from the CNA

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow an attacker to gain unauthorized access to an organization due to improper verification of a cryptographic signature. A token is accepted without its signature being fully verified, which could allow an attacker to join an organization without a valid invitation.

Why it matters now

EPSS 0.00211 11th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMAPI Connect12.1.0.0 – 12.1.1.2; 10.0.8.0 – 10.0.8.12—No fix listedCNA
  • API Connect VendorIBM Affected 12.1.0.0 – 12.1.1.2; 10.0.8.0 – 10.0.8.12 Fixed in — No fix listed CNA

CPE names CNA · 4

CPEVersionsRoleVendor
cpe:2.3:a:ibm:api_connect:12.1.0.0:*:*:*:*:*:*:*12.1.0.0—IBM
cpe:2.3:a:ibm:api_connect:12.1.1.2:*:*:*:*:*:*:*12.1.1.2—IBM
cpe:2.3:a:ibm:api_connect:10.0.8.0:*:*:*:*:*:*:*10.0.8.0—IBM
cpe:2.3:a:ibm:api_connect:10.0.8.12:*:*:*:*:*:*:*10.0.8.12—IBM
  • cpe:2.3:a:ibm:api_connect:12.1.0.0:*:*:*:*:*:*:* Versions 12.1.0.0 — ·IBM
  • cpe:2.3:a:ibm:api_connect:12.1.1.2:*:*:*:*:*:*:* Versions 12.1.1.2 — ·IBM
  • cpe:2.3:a:ibm:api_connect:10.0.8.0:*:*:*:*:*:*:* Versions 10.0.8.0 — ·IBM
  • cpe:2.3:a:ibm:api_connect:10.0.8.12:*:*:*:*:*:*:* Versions 10.0.8.12 — ·IBM

Remediation

The sources list no fixed version for IBM API Connect.

Written with Claude Haiku 5.5 from the sources below · 2026-11-08

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    IBM API Connect — ibm.com/support/pages/node/7295635

    203 records Highest priority Priority MEDIUM 45 MEDIUM, 158 LOW

    Other records, highest priority first

    • TI-2026-86389 Improper case sensitivity handling in IBM API Connect exposes admin operationsPriority MEDIUM 47
    • TI-2026-86382 OS command injection in IBM API Connect allows remote command executionPriority MEDIUM 46
    • TI-2026-86388 OS command injection in IBM API Connect lets remote attackers run codePriority MEDIUM 44
    Show all 203 records → Advisory →
  • Advisory ·

    IBM API Connect — ibm.com/support/pages/node/7295637

    135 records Highest priority Priority MEDIUM 23 MEDIUM, 112 LOW

    Other records, highest priority first

    • TI-2026-86389 Improper case sensitivity handling in IBM API Connect exposes admin operationsPriority MEDIUM 47
    • TI-2026-86382 OS command injection in IBM API Connect allows remote command executionPriority MEDIUM 46
    • TI-2026-86388 OS command injection in IBM API Connect lets remote attackers run codePriority MEDIUM 44
    Show all 135 records → Advisory →

Timeline

  1. 2026-11-07 Threatist record created from CVE-2026-105459
  2. 2026-11-07 Alias added: GHSA-33f5-gwm5-4wrm
  3. 2026-11-08 Priority changed: MEDIUM → LOW

References

Patch 2

  • TI-2026-08085 Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-23774 IBM Aspera Faspex code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-03794 Improper authentication in IBM Data Risk Manager KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-03441 Code injection in IBM Planning Analytics KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-03639 Improper handling of exceptional conditions in Apache Struts KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-06198 Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT… KEVCVSS 3.1CRITICAL 9.8
See all 9711 →

Sources

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