CVE-2026-18675: Kong Mesh · Uncaught Exception
Affects Kong MeshSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium · fixed in 2.14.2 : update Kong Mesh when convenient.
Data as of 9 Nov 2026, 23:24 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.14.2, 2.13.10, 2.12.14 +3
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 12 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Kong Inc.Kong Mesh | Affected
| Fixed in
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| Kong Inc.Kong Mesh | Affected
| Fixed in
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| Kong Inc.Kong Mesh | Affected
| Fixed in
|
| Kong Inc.Kong Mesh | Affected
| Fixed in
|
| Kong Inc.Kong Mesh | Affected
| Fixed in
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| Kong Inc.Kong Mesh | Affected
| Fixed in
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Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
If you cannot patch yet, limiting unauthenticated access to the dataplane gRPC server may reduce exposure.
Description
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.
References
- github.com/kumahq/kuma/security/advisories/GHSA-5mxq-7xq4-3vx8 (opens in a new tab)
- github.com/kumahq/kuma/pull/17465 (opens in a new tab)
- github.com/kumahq/kuma/pull/17468 (opens in a new tab)
- github.com/kumahq/kuma/pull/17467 (opens in a new tab)
- github.com/kumahq/kuma/pull/17471 (opens in a new tab)
- github.com/kumahq/kuma/pull/17469 (opens in a new tab)
- github.com/kumahq/kuma/pull/17470 (opens in a new tab)
- github.com/kumahq/kuma/pull/17472 (opens in a new tab)
- developer.konghq.com/mesh/changelog/ (opens in a new tab)