{"id":"BIT-nats-2026-58252","summary":"NATS Server: Subscribe Authz Bypass via Wildcard-Overlap","details":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.","aliases":["CVE-2026-58252","GHSA-wh7g-5m82-pmhr"],"modified":"2026-09-08T08:48:24.246187118Z","published":"2026-07-14T15:47:18.064Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:nats:nats_server:*:*:*:*:*:*:*:*"]},"references":[{"type":"FIX","url":"https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b"},{"type":"FIX","url":"https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854"},{"type":"FIX","url":"https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6"},{"type":"ARTICLE","url":"https://github.com/nats-io/nats-server/releases/tag/v2.11.16"},{"type":"ARTICLE","url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.7"},{"type":"ARTICLE","url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.0"},{"type":"ADVISORY","url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58252"}],"affected":[{"package":{"name":"nats","ecosystem":"Bitnami","purl":"pkg:bitnami/nats"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.11.16"},{"introduced":"2.12.0"},{"fixed":"2.12.7"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/nats/BIT-nats-2026-58252.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}],"schema_version":"1.9.0"}