{"cve":"CVE-2026-39350","nvd":{"published":"2026-04-15T23:16:09.477","modified":"2026-06-17T10:41:58.653","status":"Analyzed","description":"Istio is an open platform to connect, manage, and secure microservices. In versions 1.25.0 through 1.27.8, 1.28.0 through 1.28.5, 1.29.0, and 1.29.1, the serviceAccounts and notServiceAccounts fields in AuthorizationPolicy incorrectly interpret dots (.) as a regular expression matcher. Because . is a valid character in a service account name, an AuthorizationPolicy ALLOW rule targeting a service account such as cert-manager.io also matches cert-manager-io, cert-managerXio, etc. A DENY rule targeting the same name fails to block those variants. Fixes are available in versions 1.29.2, 1.28.6, and 1.27.9.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-185","CWE-863"],"references":["https://github.com/istio/istio/security/advisories/GHSA-9gcg-w975-3rjh"],"products":["istio:istio"],"source":"nvd","synced_at":"2026-10-19T22:30:49.762551342+00:00"},"epss":{"cve":"CVE-2026-39350","score":0.00209,"percentile":0.11103,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-9gcg-w975-3rjh","url":"https://osv.dev/vulnerability/GHSA-9gcg-w975-3rjh","summary":"Istio: AuthorizationPolicy serviceAccounts regex injection via unescaped dots","modified":"2026-09-10T03:51:01.413244293Z","packages":[{"ecosystem":"Go","name":"istio.io/istio","purl":"pkg:golang/istio.io/istio","ranges":[">=0.0.0-20241024090207-0bf27d49ba4b <0.0.0-20260403004500-692e460c342d"],"fixed":["0.0.0-20260403004500-692e460c342d"]}]},{"id":"GO-2026-5289","url":"https://osv.dev/vulnerability/GO-2026-5289","summary":"Istio: AuthorizationPolicy serviceAccounts regex injection via unescaped dots in istio.io/istio","modified":"2026-06-25T19:45:27.532217695Z","packages":[{"ecosystem":"Go","name":"istio.io/istio","purl":"pkg:golang/istio.io/istio","ranges":[">=0.0.0-20241024090207-0bf27d49ba4b <0.0.0-20260403004500-692e460c342d"],"fixed":["0.0.0-20260403004500-692e460c342d"]}]}],"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."]}