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CVE-2026-18679

Kong Mesh: kuma-dp connects to the control plane without verifying the TLS certificate when no CA is configured

MEDIUM
5.8
CVSS Score
Published: August 12, 2026 at 06:52 PM UTC
Updated: October 23, 2026 at 07:10 PM UTC
1 product affected across 1 vendorKong Mesh

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Severity
MEDIUM5.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

When kuma-dp is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled, and the dataplane authentication token is sent over that unverified connection. An on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Kong Mesh· Kong
90%
0 ≤ v < 2.7.262.10.0 ≤ v < 2.11.142.12.0 ≤ v < 2.12.112.13.0 ≤ v < 2.13.72.8.0 ≤ v < 2.9.1602.10.02.12.02.13.02.8.0
Affected range stops below 2.11.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.12.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.13.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.7.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.9.16, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Vendor Advisory
Source: cverecord
https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv
Patch
Source: cverecord
https://github.com/kumahq/kuma/pull/16777
Vendor AdvisoryRelease Notes
Source: cverecord
https://developer.konghq.com/mesh/changelog/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.8MEDIUMKong
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-295

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