CVE-2026-18679 json
Kong Mesh: kuma-dp connects to the control plane without verifying the TLS certificate when no CA is configured
published 2026-07-16 3 mo ago modified 2026-10-23 16 d ago also CVE-2026-52724 , GHSA-wvmp-6r4v-j6cv , GO-2026-6013 , EUVD-2026-57427
- cvss
- 5.8
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 5%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/kumahq/kuma/v2 2.7.26, 2.9.16, 2.11.14, 2.12.11, 2.13.7
- Kong Inc. Kong Mesh 2.7.26, 2.9.16, 2.11.14, 2.12.11, 2.13.7
- github.com/kumahq/kuma@2ecadac commit
- github.com/kumahq/kuma#16777 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 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 |
| CNA | 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/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/kumahq/kuma/v2 | <2.7.26 >=2.8.0, <2.9.16 >=2.10.0, <2.11.14 >=2.12.0, <2.12.11 >=2.13.0, <2.13.7 >=2.9.13, <2.11.14 >=2.12.4, <2.12.11 |
2.7.26 2.9.16 2.11.14 2.12.11 2.13.7 |
| go | github.com/kumahq/kuma | <=1.8.1 all versions |
no fix listed |
Affected products
- Kong Inc. Kong Mesh
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
github.com
/kumahq/kuma/pull/16777
patch, web
-
github.com
/kumahq/kuma/commit/2ecadac1aa2fd8cded4c2ab768949f4c2ec83e2a
web, patch
-
github.com
/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv
vendor-advisory, web, advisory
-
developer.konghq.com
/mesh/changelog/
release-notes
-
github.com
/kumahq/kuma
package
Sources
- CVE List CVE-2026-18679
- GitHub Advisory GHSA-wvmp-6r4v-j6cv
- NVD CVE-2026-18679
- OSV GO-2026-6013
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