{"id":"GHSA-9gcg-w975-3rjh","summary":"Istio: AuthorizationPolicy serviceAccounts regex injection via unescaped dots","details":"### Impact\nThe `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 SA e.g. `cert-manager.io` also matches `cert-manager-io`, `cert-managerXio`, etc. A DENY rule targeting the same name fails to block those variants.\n\n### Patches\nFixes are available in 1.29.2, 1.28.6, and 1.27.9\n\n### Workarounds\nNone","aliases":["CVE-2026-39350","GO-2026-5289"],"modified":"2026-07-17T21:04:27.379824565Z","published":"2026-04-16T20:44:46Z","database_specific":{"github_reviewed_at":"2026-04-16T20:44:46Z","nvd_published_at":"2026-04-15T23:16:09Z","cwe_ids":["CWE-185"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/istio/istio/security/advisories/GHSA-9gcg-w975-3rjh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39350"},{"type":"WEB","url":"https://github.com/istio/istio/commit/692e460c342d8f308a35b6ecbdace47807da8ade"},{"type":"PACKAGE","url":"https://github.com/istio/istio"}],"affected":[{"package":{"name":"istio.io/istio","ecosystem":"Go","purl":"pkg:golang/istio.io/istio"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-20241024090207-0bf27d49ba4b"},{"fixed":"0.0.0-20260403004500-692e460c342d"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9gcg-w975-3rjh/GHSA-9gcg-w975-3rjh.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}