{"cve":"CVE-2023-42816","nvd":{"published":"2023-11-13T21:15:08.127","modified":"2026-06-17T06:24:34.883","status":"Modified","description":"Kyverno is a policy engine designed for Kubernetes. A security vulnerability was found in Kyverno where an attacker could cause denial of service of Kyverno. The vulnerability was in Kyvernos Notary verifier. An attacker would need control over the registry from which Kyverno would fetch signatures. With such a position, the attacker could return a malicious response to Kyverno, when Kyverno would send a request to the registry. The malicious response would cause denial of service of Kyverno, such that other users' admission requests would be blocked from being processed. This is a vulnerability in a new component released in v1.11.0. The only users affected by this are those that have been building Kyverno from source at the main branch which is not encouraged. Users consuming official Kyverno releases are not affected. There are no known cases of this vulnerability being exploited in the wild.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H","score":5.3},"cwes":["CWE-345"],"references":["https://github.com/kyverno/kyverno/commit/80d139bb5d1d9d7e907abe851b97dc73821a5be2","https://github.com/kyverno/kyverno/commit/fec2992e3f9fcd6b9c62267522c09b182e7df73b","https://github.com/kyverno/kyverno/pull/8428","https://github.com/kyverno/kyverno/security/advisories/GHSA-4mp4-46gq-hv3r","https://github.com/kyverno/kyverno/commit/80d139bb5d1d9d7e907abe851b97dc73821a5be2"],"products":["nirmata:kyverno"],"source":"nvd","synced_at":"2026-10-19T21:42:07.670898610+00:00"},"epss":{"cve":"CVE-2023-42816","score":0.00457,"percentile":0.39638,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GO-2023-2338","url":"https://osv.dev/vulnerability/GO-2023-2338","summary":"Denial of service from malicious signature in kyverno in github.com/kyverno/kyverno","modified":"2026-03-03T04:51:36.783823Z","packages":[{"ecosystem":"Go","name":"github.com/kyverno/kyverno","purl":"pkg:golang/github.com/kyverno/kyverno","ranges":[">=1.5.0-rc1.0.20230601080528-80d139bb5d1d <1.5.0-rc1.0.20230918070231-fec2992e3f9f"],"fixed":["1.5.0-rc1.0.20230918070231-fec2992e3f9f"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}