{"answers":{"affected":"3 open source packages ship an affected version, including github.com/kubewarden/kubewarden-controller.","exploited":"There is no known exploitation of CVE-2026-42541 in the wild and no public exploit code.","fix":"Upgrade github.com/kubewarden/kubewarden-controller to 1.35.0 or later.","what":"CVE-2026-42541 is a medium-severity vulnerability in kubewarden-controller, published on 12 May 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-42541 and fix it if it is affected.\n\nWhat it is: CVE-2026-42541 is a medium-severity vulnerability in kubewarden-controller, published on 12 May 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-2026-42541 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/kubewarden/kubewarden-controller (Go): affected all versions; fixed in 1.35.0\n- github.com/kubewarden/kubewarden-controller (Go): affected all versions; fixed in 1.35.0\n- github.com/kubewarden/kubewarden-controller (Go): affected all versions; fixed in 1.35.0\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-2026-42541/ (Markdown: https://insights.sbomify.com/CVE-2026-42541/index.md)","id":"CVE-2026-42541","markdown":"https://insights.sbomify.com/CVE-2026-42541/index.md","name":"CVE-2026-42541","record":{"aliases":["GHSA-wqcw-g35j-j578","GO-2026-5716"],"analysis":{"component_type":"cloud_service","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"Kubernetes policy engine","requires_auth":"low_privilege","summary":"Attackers with specific policy creation permissions can enumerate cluster RBAC permissions via unchecked host callbacks, exposing sensitive access control information.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"description":"Kubewarden is a policy engine for Kubernetes. Prior to , An attacker with privileged AdmissionPolicy or AdmissionPolicyGroup create permissions (which isn't the default) can craft a policy that makes use of the can_i host callback. The callback issues a SubjectAccessReview (SAR) requests to enumerate RBAC permissions of any user or service account across the cluster. can_i does not perform that check to enforce the context-aware allow-list and forwards the request directly to the callback handler, which executes a real SubjectAccessReview using policy-server privileges. This creates a policy-level authorization gap: can_i is effectively usable even when the policy has no context-aware resource grant. This is an information disclosure / reconnaissance issue, and not direct workload data exfiltration. The attacker learns permission information, such as whether specific service accounts can \"get secrets\", \"create pods\", or \"bind clusterroles\" in chosen namespaces. This vulnerability is fixed in .","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":"Kubewarden: RBAC Reconnaissance via unchecked can_i host capability call","id":"CVE-2026-42541","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)","id":"CVE-2026-42542"},"packages":[{"ecosystem":"Go","fixed":["1.35.0"],"introduced":["0"],"last_affected":[],"package":"github.com/kubewarden/kubewarden-controller","purl":null,"source":"GHSA-wqcw-g35j-j578"},{"ecosystem":"Go","fixed":["1.35.0"],"introduced":["0"],"last_affected":[],"package":"github.com/kubewarden/kubewarden-controller","purl":"pkg:golang/github.com/kubewarden/kubewarden-controller","source":"GHSA-wqcw-g35j-j578"},{"ecosystem":"Go","fixed":["1.35.0"],"introduced":["0"],"last_affected":[],"package":"github.com/kubewarden/kubewarden-controller","purl":"pkg:golang/github.com/kubewarden/kubewarden-controller","source":"GO-2026-5716"}],"prev":{"headline":"IRIS has a Mass Assignment issue","id":"CVE-2026-42540"},"products":["kubewarden-controller"],"published":"2026-05-12","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":"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":"2026-05-14","vendors":["kubewarden"]},"summary":"Attackers with specific policy creation permissions can enumerate cluster RBAC permissions via unchecked host callbacks, exposing sensitive access control information.","url":"https://insights.sbomify.com/CVE-2026-42541/"}