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CVE-2026-14916

Kong API Gateway Enterprise: JWT Algorithm-Confusion

High7.7EPSS 0.70%
Published
Updated
Reserved
Assigned by
Kong

Description

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.

Scores

CVSS scores of CVE-2026-14916, by who scored it
Scored byCVSSScoreVector
KongCNA (assigner)4.0High7.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
NVDNVD · Awaiting Analysis4.0High7.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.70% · top 47% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.

Weakness

Affected products

  • Kong · Kong Enteprise Gateway

    • affected 3.15.0.0 – < 3.15.0.3
    • affected 3.14.0.0 – < 3.14.0.12
    • affected 3.13.0.0 – < 3.13.0.9
    • affected 3.12.0.0 – < 3.12.0.10
    • affected 3.10.0.0 – < 3.10.0.17
    • affected 3.4.0.0 – < 3.4.3.29

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .