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TI-2026-12561 Aliases CVE-2026-14916GHSA-5qvf-77w7-x85r

Kong API Gateway Enterprise: JWT Algorithm-Confusion

Priority MEDIUM 41CWE-241Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A JWT signature verification vulnerability affects Kong components that perform JWT validation for MCP OAuth2 or DataKit integrations inside Kong API Gateway Enterprise. The affected code does not properly validate that the JWT signing algorithm is compatible with the type of key used for verification. As a result, an unauthenticated remote attacker may be able to craft a forged JWT that is incorrectly accepted as valid, leading to authentication bypass and potential compromise of confidentiality, integrity, and availability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00697 53rd percentileScored 2026-11-07
Fix Fixed Kong Enteprise Gateway (Kong): 3.15.0.3, 3.14.0.12, 3.13.0.9 +3

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
Kong Inc.Kong Enteprise Gateway3.15.0.0 to before 3.15.0.3; 3.14.0.0 to before 3.14.0.12; 3.13.0.0 to before 3.13.0.9; 3.12.0.0 to before 3.12.0.10; 3.10.0.0 to before 3.10.0.17; 3.4.0.0 to before 3.4.3.293.15.0.3, 3.14.0.12, 3.13.0.9, 3.12.0.10, 3.10.0.17, 3.4.3.29Patch availableCNA
  • Kong Enteprise Gateway VendorKong Inc. Affected 3.15.0.0 to before 3.15.0.3; 3.14.0.0 to before 3.14.0.12; 3.13.0.0 to before 3.13.0.9; 3.12.0.0 to before 3.12.0.10; 3.10.0.0 to before 3.10.0.17; 3.4.0.0 to before 3.4.3.29 Fixed in 3.15.0.3, 3.14.0.12, 3.13.0.9, 3.12.0.10, 3.10.0.17, 3.4.3.29 Patch available CNA

Remediation

  • Fix · CNA Kong Enteprise Gateway (Kong) Fixed in 3.15.0.3, 3.14.0.12, 3.13.0.9, 3.12.0.10, 3.10.0.17, 3.4.3.29

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-14916
  2. 2026-10-03 Alias added: GHSA-5qvf-77w7-x85r

References

Other 1

  • TI-2020-17871 The official kong docker images before 1.0.2-alpine (Alpine specific) contain a blank… CVSS 3.1CRITICAL 9.8
  • TI-2025-00925 Arbitrary Code Execution in Kong Insomnia Desktop Application CVSS 4.0CRITICAL 9.3
  • TI-2026-12562 Kong API Gateway Enterprise: SAML Authentication bypass CVSS 4.0HIGH 7.7
  • TI-2020-18854 Kong lua-multipart multipart.lua is_header redos CVSS 3.1HIGH 7.5
  • TI-2026-70893 SQL injection in Kong Gateway clustering communication CVSS 4.0HIGH 7.5
  • TI-2025-01158 Kong Insomnia profapi.dll untrusted search path CVSS 4.0HIGH 7.3
See all 16 →

Sources

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