{"answers":{"affected":"6 open source packages ship an affected version, including github.com/cilium/cilium, cilium and cilium-operator. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-56743 in the wild and no public exploit code.","fix":"Upgrade github.com/cilium/cilium to 1.19.5 or later.","what":"CVE-2026-56743 is a medium-severity missing authorization vulnerability in cilium, published on 15 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-56743 and fix it if it is affected.\n\nWhat it is: CVE-2026-56743 is a medium-severity missing authorization vulnerability in cilium, published on 15 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-56743 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/cilium/cilium (Go): affected from 1.19.0; fixed in 1.19.5\n- github.com/cilium/cilium (Go): affected from 1.19.0; fixed in 1.19.5\n- github.com/cilium/cilium (Go): affected from 1.19.0; fixed in 1.19.5\n- cilium (Bitnami): affected from 1.19.0; fixed in 1.19.5\n- cilium-operator (Bitnami): affected from 1.19.0; fixed in 1.19.5\n- hubble-relay (Bitnami): affected from 1.19.0; fixed in 1.19.5\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-2026-56743/ (Markdown: https://insights.sbomify.com/CVE-2026-56743/index.md)","id":"CVE-2026-56743","markdown":"https://insights.sbomify.com/CVE-2026-56743/index.md","name":"CVE-2026-56743","record":{"aliases":["BIT-cilium-2026-56743","BIT-cilium-operator-2026-56743","BIT-hubble-relay-2026-56743","GHSA-fm8w-2m5w-9j7r","GO-2026-6367","MINI-2p8v-pvgj-wc6f","MINI-2wvm-mx9p-q968","MINI-5244-f9pc-8mhq","MINI-5mvp-r3h9-5484","MINI-f6c8-2xwg-jw76","MINI-g69v-v3vg-rcjx","MINI-gc2v-4h6j-9qhv","MINI-hh43-hm9q-mffq","MINI-hmx6-wgff-3jx8","MINI-mr5r-cxwf-4gj8","MINI-v895-4c23-c359","MINI-vcpw-hrrm-9j4c","MINI-vp4f-vc39-hqwm","MINI-vpmg-98q4-hpfj","MINI-vqh8-j2jc-wx87","MINI-xj9f-q2p4-55g5"],"analysis":{"component_type":"container_or_infrastructure","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Cilium network security","requires_auth":"low_privilege","summary":"Cilium incorrectly allows ingress traffic from the local namespace when using specific NetworkPolicy ipBlock rules with a custom clusterName, bypassing intended network isolation.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"cilium","vendor":"cilium"}],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"Cilium is a networking, observability, and security solution. From 1.19.0 to 1.19.4, standard Kubernetes NetworkPolicy specifications using CIDR-based ipBlock rules without pod or namespace selectors erroneously generate a wildcard namespace allow rule when Cilium is configured with a custom clusterName rather than the default any value. The parser incorrectly instantiates a pod selector on selectorless peer definitions, allowing traffic from other workloads in the same namespace as the subject of the policy. This issue is fixed in version 1.19.5.","ecosystems":["Bitnami","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":"Cilium may unexpectedly allow ingress traffic from the local namespace when a Kubernetes NetworkPolicy is configured with an ipBlock match","id":"CVE-2026-56743","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":6,"n_references":6,"next":{"headline":"`@bsv/wallet-toolbox` / `-client` / `-mobile` don't verify storage-supplied recipient output scripts against caller-requested outputs in createAction","id":"CVE-2026-56744"},"packages":[{"ecosystem":"Bitnami","fixed":["1.19.5"],"introduced":["1.19.0"],"last_affected":[],"package":"cilium","purl":"pkg:bitnami/cilium","source":"BIT-cilium-2026-56743"},{"ecosystem":"Bitnami","fixed":["1.19.5"],"introduced":["1.19.0"],"last_affected":[],"package":"cilium-operator","purl":"pkg:bitnami/cilium-operator","source":"BIT-cilium-operator-2026-56743"},{"ecosystem":"Bitnami","fixed":["1.19.5"],"introduced":["1.19.0"],"last_affected":[],"package":"hubble-relay","purl":"pkg:bitnami/hubble-relay","source":"BIT-hubble-relay-2026-56743"},{"ecosystem":"Go","fixed":["1.19.5"],"introduced":["1.19.0"],"last_affected":[],"package":"github.com/cilium/cilium","purl":null,"source":"GHSA-fm8w-2m5w-9j7r"},{"ecosystem":"Go","fixed":["1.19.5"],"introduced":["1.19.0"],"last_affected":[],"package":"github.com/cilium/cilium","purl":"pkg:golang/github.com/cilium/cilium","source":"GHSA-fm8w-2m5w-9j7r"},{"ecosystem":"Go","fixed":["1.19.5"],"introduced":["1.19.0"],"last_affected":[],"package":"github.com/cilium/cilium","purl":"pkg:golang/github.com/cilium/cilium","source":"GO-2026-6367"}],"prev":{"headline":"Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces","id":"CVE-2026-56742"},"products":["cilium"],"published":"2026-07-15","related":[{"cvss_score":9.2,"headline":"Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access","id":"CVE-2026-49445","kev_date_added":null,"published":"2026-07-15"},{"cvss_score":8.8,"headline":"Incorrect Default Permissions in Cilium","id":"CVE-2022-29178","kev_date_added":null,"published":"2022-05-20"},{"cvss_score":8,"headline":"Insecure IPsec transport encryption in Cilium","id":"CVE-2024-28860","kev_date_added":null,"published":"2024-03-27"},{"cvss_score":7.9,"headline":"Cillium exposes sensitive information included in the cilium-bugtool debug archive","id":"CVE-2026-41520","kev_date_added":null,"published":"2026-05-08"},{"cvss_score":7.9,"headline":"Cilium leaks sensitive information in cilium-bugtool","id":"CVE-2024-37307","kev_date_added":null,"published":"2024-06-13"},{"cvss_score":7.6,"headline":"Cilium NetworkPolicy bypass via pod labels","id":"CVE-2023-39347","kev_date_added":null,"published":"2023-09-26"},{"cvss_score":7.5,"headline":"Improper Privilege Management in Cilium","id":"CVE-2022-29179","kev_date_added":null,"published":"2022-05-20"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"2026-07-16","vendors":["cilium"]},"summary":"Cilium incorrectly allows ingress traffic from the local namespace when using specific NetworkPolicy ipBlock rules with a custom clusterName, bypassing intended network isolation.","url":"https://insights.sbomify.com/CVE-2026-56743/"}