CVE-2026-52724Hinoki check available

Proxy takeover via disabled TLS peer verification

Published Sep 15, 2026 · Updated Sep 15, 2026

Improper certificate validation in Kong Inc. Kuma allows man-in-the-middle attackers to take over Universal mode data plane proxies. When neither --ca-cert-file nor KUMA_CONTROL_PLANE_CA_CERT is set, kuma-dp disables TLS peer verification and transmits its authentication token over the unverified HTTPS connection. Exploitation requires an on-path position and the CA-less Universal configuration; standard Kubernetes installations inject a CA and are unaffected.

CVSS severity5.8
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Improper certificate validation in Kong Inc. Kuma allows man-in-the-middle attackers to take over Universal mode data plane proxies. When neither --ca-cert-file nor KUMA_CONTROL_PLANE_CA_CERT is set, kuma-dp disables TLS peer verification and transmits its authentication token over the unverified HTTPS connection. Exploitation requires an on-path position and the CA-less Universal configuration; standard Kubernetes installations inject a CA and are unaffected.

The record

CVE
CVE-2026-52724
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Kong Inc.
Product
Kuma
Classifications
CWE-295, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.10.0, < 2.11.14
  2. Affected versionversion=>= 2.12.0, < 2.12.11
  3. Affected versionversion=>= 2.13.0, < 2.13.7
  4. Affected versionversion=< 2.7.26
  5. Affected versionversion=>= 2.8.0, < 2.9.16

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Kong Inc. · Kumaversion=>= 2.10.0, < 2.11.14; version=>= 2.12.0, < 2.12.11; version=>= 2.13.0, < 2.13.7; version=< 2.7.26; version=>= 2.8.0, < 2.9.16

Published CVSS scores

5.8GitHubCVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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