{"answers":{"affected":"5 open source packages ship an affected version, including github.com/kcp-dev/kcp. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-39429 in the wild and no public exploit code.","fix":"Upgrade github.com/kcp-dev/kcp to a fixed version for your release line: 0.29.3 or 0.30.3.","what":"CVE-2026-39429 is a high-severity missing authorization vulnerability in kcp-dev kcp, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-39429 and fix it if it is affected.\n\nWhat it is: CVE-2026-39429 is a high-severity missing authorization vulnerability in kcp-dev kcp, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-39429 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/kcp-dev/kcp (Go): affected all versions; fixed in 0.29.3, 0.30.3\n- github.com/kcp-dev/kcp (Go): affected all versions; fixed in 0.29.3\n- github.com/kcp-dev/kcp (Go): affected all versions; fixed in 0.29.3\n- github.com/kcp-dev/kcp (Go): affected from 0.30.0; fixed in 0.30.3\n- github.com/kcp-dev/kcp (Go): affected from 0.30.0; fixed in 0.30.3\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-2026-39429/ (Markdown: https://insights.sbomify.com/CVE-2026-39429/index.md)","id":"CVE-2026-39429","markdown":"https://insights.sbomify.com/CVE-2026-39429/index.md","name":"CVE-2026-39429","record":{"aliases":["GHSA-3j3q-wp9x-585p","GO-2026-5088"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Kubernetes-like control plane","requires_auth":"none","summary":"Attackers can read and write to the cache server without authentication because the root shard exposes it without checks.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"kcp","vendor":"kcp"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"},{"id":"CWE-302","name":"Authentication Bypass by Assumed-Immutable Data"}],"description":"kcp is a Kubernetes-like control plane for form-factors and use-cases beyond Kubernetes and container workloads. Prior to 0.30.3 and 0.29.3, the cache server is directly exposed by the root shard and has no authentication or authorization in place. This allows anyone who can access the root shard to read and write to the cache server. This vulnerability is fixed in 0.30.3 and 0.29.3.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"kcp's cache server is accessible without authentication or authorization checks","id":"CVE-2026-39429","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":5,"n_references":3,"next":{"headline":"WordPress Timetics plugin \u003c= 1.0.53 - Broken Access Control vulnerability","id":"CVE-2026-39432"},"packages":[{"ecosystem":"Go","fixed":["0.29.3","0.30.3"],"introduced":["0","0.30.0"],"last_affected":[],"package":"github.com/kcp-dev/kcp","purl":"pkg:golang/github.com/kcp-dev/kcp","source":"GO-2026-5088"},{"ecosystem":"Go","fixed":["0.29.3"],"introduced":["0"],"last_affected":[],"package":"github.com/kcp-dev/kcp","purl":null,"source":"GHSA-3j3q-wp9x-585p"},{"ecosystem":"Go","fixed":["0.29.3"],"introduced":["0"],"last_affected":[],"package":"github.com/kcp-dev/kcp","purl":"pkg:golang/github.com/kcp-dev/kcp","source":"GHSA-3j3q-wp9x-585p"},{"ecosystem":"Go","fixed":["0.30.3"],"introduced":["0.30.0"],"last_affected":[],"package":"github.com/kcp-dev/kcp","purl":null,"source":"GHSA-3j3q-wp9x-585p"},{"ecosystem":"Go","fixed":["0.30.3"],"introduced":["0.30.0"],"last_affected":[],"package":"github.com/kcp-dev/kcp","purl":"pkg:golang/github.com/kcp-dev/kcp","source":"GHSA-3j3q-wp9x-585p"}],"prev":{"headline":"CubeCart: Stored Cross-Site Scripting (XSS)","id":"CVE-2026-39428"},"products":["kcp"],"published":"2026-04-08","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-04-10","vendors":["kcp-dev"]},"summary":"Attackers can read and write to the cache server without authentication because the root shard exposes it without checks.","url":"https://insights.sbomify.com/CVE-2026-39429/"}