CVE-2026-123041

Cross-User Data Leakage via Misconstructed Cache Key in Kong Request-Callout Plugin

Published Nov 10, 2026 CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Description
The request-callout plugin in Kong Gateway Enterprise and Kong AI Gateway omits callout headers not sent by the client from its cache key, allowing a cached callout response for a caller to be served to another.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Cross-User Data Leakage via Misconstructed Cache Key in Kong Request-Callout Plugin
Type Values Removed Values Added
First Time appeared Konghq
Konghq kong Ai Gateway
Konghq kong Gateway Enterprise
Vendors & Products Konghq
Konghq kong Ai Gateway
Konghq kong Gateway Enterprise
Type Values Removed Values Added
Title Cross-user Data Leakage via Cached Request-callout Responses
Type Values Removed Values Added
Title Cross-user Data Leakage via Cached Request-callout Responses
Type Values Removed Values Added
Description The request-callout plugin in Kong Gateway Enterprise and Kong AI Gateway omits callout headers not sent by the client from its cache key, allowing a cached callout response for a caller to be served to another.
Weaknesses CWE-524
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Kong
Published
Updated
Nov 13, 2026, 1:41 PM
Reserved
Nov 5, 2026, 8:13 AM
Status
Awaiting Analysis
Published
Nov 10, 2026, 10:18 PM
Modified
Nov 13, 2026, 2:17 PM