{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-18677 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-18677 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-18677 is a medium-severity authentication bypass vulnerability in Kong Mesh, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-18677 and fix it if it is affected.\n\nWhat it is: CVE-2026-18677 is a medium-severity authentication bypass vulnerability in Kong Mesh, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-18677 in the wild and no public exploit code.\n\nAffected product: Kong Mesh. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-18677/ (Markdown: https://insights.sbomify.com/CVE-2026-18677/index.md)","id":"CVE-2026-18677","markdown":"https://insights.sbomify.com/CVE-2026-18677/index.md","name":"CVE-2026-18677","record":{"aliases":["GHSA-6p7w-xxw9-j47f","GHSA-744g-c785-x65q"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["privilege_escalation","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Kong Mesh service mesh","requires_auth":"low_privilege","summary":"Attackers can impersonate any workload and obtain its SPIFFE identity in Kong Mesh universal mode if workload binding is optional.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Kong","cpe":[],"cvss":{"score":6,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-290","name":"Authentication Bypass by Spoofing"}],"description":"In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane's kuma.io/workload label, the XDS authenticator in kuma-cp validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with kuma.io/workload set to any value and obtain another workload's SPIFFE identity.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity","id":"CVE-2026-18677","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Kong Mesh: kumactl connects to the control plane without verifying the TLS certificate when no CA is configured","id":"CVE-2026-18678"},"packages":[],"prev":{"headline":"Kong Mesh: default control plane config leaks the admin token cross-origin via a CORS wildcard and localhost admin","id":"CVE-2026-18676"},"products":["Kong Mesh"],"published":"2026-08-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-13","vendors":["Kong Inc."]},"summary":"Attackers can impersonate any workload and obtain its SPIFFE identity in Kong Mesh universal mode if workload binding is optional.","url":"https://insights.sbomify.com/CVE-2026-18677/"}