CVE-2026-18675Kong Mesh: control plane denial of service via a malformed dataplane token with a non-string JWT kid
Updated under an hour ago ()
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It affects Kong Inc. Kong Mesh. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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The dataplane token validator in kuma-cp performs an unchecked Go type assertion on the JWT kid header. A token whose kid is a JSON number decodes as a float64 and triggers a runtime panic before any signature, claims, or authorization check runs. The panic terminates the entire kuma-cp process, HTTP API, the health and readiness endpoints, and xDS. Unauthenticated access to the dataplane gRPC server can trigger the crash with a malformed token A single request is a transient interruption; sustaining an outage requires repeated requests.
- CVSS
- 5.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-248, CWE-704
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Kong
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Kong Inc. Kong Mesh kong:mesh (from the name) | before 2.7.29; from 2.8.0 before 2.9.19; from 2.10.0 before 2.11.18; from 2.12.0 before 2.12.14; from 2.13.0 before 2.13.10; from 2.14.0 before 2.14.2 | CNA record |
References
- https://github.com/kumahq/kuma/security/advisories/GHSA-5mxq-7xq4-3vx8vendor-advisory
- https://github.com/kumahq/kuma/pull/17465patch
- https://github.com/kumahq/kuma/pull/17468patch
- https://github.com/kumahq/kuma/pull/17467patch
- https://github.com/kumahq/kuma/pull/17471patch
- https://github.com/kumahq/kuma/pull/17469patch
- https://github.com/kumahq/kuma/pull/17470patch
- https://github.com/kumahq/kuma/pull/17472patch
- https://developer.konghq.com/mesh/changelog/release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.