CVE-2026-18679Published

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

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-18679

Published

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.

Source published: 12 Aug 2026 18:52:31 UTC
Source modified: 13 Aug 2026 14:45:35 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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

cve-program · CVE-2026-52724

Published

Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.26, 2.9.16, 2.11.14, 2.12.11, and 2.13.7, Universal mode kuma-dp connections to an HTTPS control plane disable TLS peer verification when --ca-cert-file is not supplied and KUMA_CONTROL_PLANE_CA_CERT is unset. The dataplane authentication token is sent over the unverified connection, allowing an on-path attacker to intercept the token, impersonate the control plane, inject a forged bootstrap configuration, and take over the proxy. Standard Kubernetes installations created by kumactl install control-plane or the official Helm chart are unaffected because the mutating admission webhook injects KUMA_CONTROL_PLANE_CA_CERT into each sidecar. This issue is fixed in versions 2.7.26, 2.9.16, 2.11.14, 2.12.11, and 2.13.7.

Source published: 15 Sep 2026 14:50:32 UTC
Source modified: 15 Sep 2026 15:21:20 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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

euvd · EUVD-2026-57427

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Aug 12, 2026, 6:52:31 PM

dateUpdated: Aug 13, 2026, 2:45:35 PM

Source published: Aug 12, 2026, 6:52:31 PM (timezone not stated)
Source modified: Aug 13, 2026, 2:45:35 PM (timezone not stated)
Observed here: 7 Nov 2026 05:28:06 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

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

euvd · EUVD-2026-78771

Published

Original publisher date fields

datePublished: Sep 15, 2026, 2:50:32 PM

dateUpdated: Sep 15, 2026, 3:21:20 PM

Source published: Sep 15, 2026, 2:50:32 PM (timezone not stated)
Source modified: Sep 15, 2026, 3:21:20 PM (timezone not stated)
Observed here: 7 Nov 2026 11:35:26 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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

nvd · CVE-2026-18679

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Weakness classifications: CWE-295

Original publisher date fields

published: 2026-08-12T20:17:41.957

lastModified: 2026-10-23T19:10:00.167

Source published: 12 Aug 2026 20:17:41 UTC
Source modified: 23 Oct 2026 19:10:00 UTC
Observed here: 25 Oct 2026 05:17:25 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb · Secondary · 5.8 CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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

nvd · CVE-2026-52724

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Weakness classifications: CWE-295

Original publisher date fields

published: 2026-09-15T15:17:17.110

lastModified: 2026-09-30T17:43:24.057

Source published: 15 Sep 2026 15:17:17 UTC
Source modified: 30 Sep 2026 17:43:24 UTC
Observed here: 25 Oct 2026 13:17:10 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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CVSS 4.0 · [email protected] · Secondary · 5.8 CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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

osv · GHSA-wvmp-6r4v-j6cv

Published

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. The dataplane authentication token is sent over this unverified connection ## Impact An on-path attacker can intercept the dataplane authentication token and impersonate the control plane to the data plane, allowing them to inject a forged bootstrap configuration and take over the proxy ## Affected configurations - Universal mode `kuma-dp` started against an HTTPS control plane without `--ca-cert-file` (or `KUMA_CONTROL_PLANE_CA_CERT` unset) ## Not affected - Kubernetes installs done through the standard installers (`kumactl install control-plane` or the official Helm chart). In both cases the control plane's mutating admission webhook injects `KUMA_CONTROL_PLANE_CA_CERT` into every sidecar at pod admission, so each `kuma-dp` starts with the CA already configured ## Workarounds Set `--ca-cert-file` (or `KUMA_CONTROL_PLANE_CA_CERT`) on every Universal mode data plane and point it at the control plane's serving CA. Alternatively, terminate the control plane behind a publicly trusted certificate; the patched releases will verify successfully against the operating system trust store with no further configuration ## Resources - Fix: https://github.com/kumahq/kuma/pull/16777

Source published: 16 Jul 2026 20:09:12 UTC
Source modified: 13 Aug 2026 04:10:47 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V4 · CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

Publisher rating · MODERATE

osv · GO-2026-6013

Published

kuma-dp connects to control plane without verifying TLS certificate when no CA is configured in github.com/kumahq/kuma. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/kumahq/kuma/v2 from v2.8.0 before v2.9.16.

Source published: 22 Jul 2026 20:36:55 UTC
Source modified: 13 Aug 2026 04:10:47 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.