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VulnerabilityPublished

CVE-2026-18675: Kong Mesh · Uncaught Exception

Affects Kong MeshSource CVE Database V5

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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

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Kong Inc.Kong MeshAffected
  • >=2.14.0 <2.14.2
Fixed in
  • 2.14.2
Kong Inc.Kong MeshAffected
  • >=2.13.0 <2.13.10
Fixed in
  • 2.13.10
Kong Inc.Kong MeshAffected
  • >=2.12.0 <2.12.14
Fixed in
  • 2.12.14
Kong Inc.Kong MeshAffected
  • >=2.10.0 <2.11.18
Fixed in
  • 2.11.18
Kong Inc.Kong MeshAffected
  • >=2.8.0 <2.9.19
Fixed in
  • 2.9.19
Kong Inc.Kong MeshAffected
  • <2.7.29
Fixed in
  • 2.7.29

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

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