{"id":"CVE-2023-25165","aliases":["BIT-helm-2023-25165","GHSA-pwcw-6f5g-gxf8","GO-2023-1547"],"url":"https://o3.security/vulnerability/CVE-2023-25165","summary":"getHostByName Function Information Disclosure","details":"Helm is a tool that streamlines installing and managing Kubernetes applications.`getHostByName` is a Helm template function introduced in Helm v3. The function is able to accept a hostname and return an IP address for that hostname. To get the IP address the function performs a DNS lookup. The DNS lookup happens when used with `helm install|upgrade|template` or when the Helm SDK is used to render a chart. Information passed into the chart can be disclosed to the DNS servers used to lookup the IP address. For example, a malicious chart could inject `getHostByName` into a chart in order to disclose values to a malicious DNS server. The issue has been fixed in Helm 3.11.1. Prior to using a chart with Helm verify the `getHostByName` function is not being used in a template to disclose any information you do not want passed to DNS servers.","published":"2023-02-08T19:07:14.089Z","modified":"2026-08-12T03:51:29.857439930Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.00768,"percentile":0.53893,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"helm.sh/helm/v3","fixedVersion":"3.11.1"}],"fix":{"url":"https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2","label":"helm/helm@5abcf74"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/25xxx/CVE-2023-25165.json"},{"type":"ADVISORY","url":"https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-25165"},{"type":"FIX","url":"https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:29.857439930Z"}}